Document:

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                                                                    Exhibit 10.1

May 15, 2000

Name
Address

Dear Mr./Ms.,

Your Change in Control Agreement dated __________  related to the provisions
that address Limitation on Payment and Benefits, Article III, 1.c.  This section
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will be replaced in its entirety with the following paragraphs:

     Limitation on Change in Control Payments. Notwithstanding anything in this
     ----------------------------------------
     Agreement to the contrary, if any of the payments or benefits to be made or
     provided in connection with this Agreement, together with any other
     payments, benefits or awards which you have the right to receive from the
     company, or any corporation which is a member of an "affiliated group" (as
     defined in section 1504(a) of the Code without any regard to section
     1504(b) of the Code) of which the Company is a member ("Affiliate"),
     constitute an "excess parachute payment" (as defined in Section 280G(b) of
     the Code), two calculations will be performed. In the first calculation,
     the payments, benefits or awards to be received solely pursuant to this
     Agreement (and excluding any benefits to be received from the existing
     Stock Option and Incentive Plan) will be reduced by the amount the Company
     deems necessary so that none of the payments or benefits under the
     Agreement (including those from the existing Stock Option and Incentive
     Plan) are excess parachute payments. In the second calculation, the
     payments will not be reduced so as to eliminate an excess parachute
     payment, but will be reduced by the amount of the applicable excise tax
     that the officer will pay related to all change in control benefits
     received as imposed by section 4999 of the Code. The two calculations will
     be compared and the calculation providing the largest net payment to the
     employee will be utilized to determine the change in control payments made
     to the officer. The calculations must be made in good faith by legal
     counsel or a certified public accountant selected by the Company, and such
     determination will be conclusive and binding upon you and the Company.

     If a reduction in payments or benefits is required by the comparison above,
     the payments or benefits under the Agreement shall be reduced in the order
     that minimizes the amount of total reduction in payments and benefits under
     the Agreement as a result of this provision.
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(Name), if you are in accord with this change to your agreement, please sign and
return the enclosed copy of this letter which will then constitute our agreement
on this subject.

Sincerely,

BIO-VASCULAR, INC.

By:___________________________

Title:________________________

Agreed to:

By:___________________________Exhibit 4(a)

                            OAK HILL FINANCIAL, INC.

               FOURTH AMENDED AND RESTATED 1995 STOCK OPTION PLAN

                           (as amended April 25, 2000)

         1.  Purpose.  This plan (the "Plan") is intended as an incentive and to
encourage stock  ownership by certain key employees,  officers and directors of,
and consultants and advisers who render services to, Oak Hill Financial, Inc. an
Ohio  corporation  (the  "Company")  and any current or future  subsidiaries  or
parent of the  Company by the  granting  of stock  options  (the  "Options")  as
provided  herein.  By  encouraging  such stock  ownership,  the Company seeks to
attract,  retain and motivate employees,  officers,  directors,  consultants and
advisers.  The  Options  granted  under the Plan may be either  incentive  stock
options  ("ISOs")  which meet the  requirements  of section 422 of the  Internal
Revenue Code of 1986, as amended from time to time  hereafter  (the "Code"),  or
nonstatutory options which do not meet such requirements ("NSOs").

         2.       Effective Date.  The Plan will become effective on August 8,
1995 (the "Effective Date").

         3.       Administration.

                  (a)  The  Plan  will  be  administered  by  a  committee  (the
"Committee")  appointed by the Board of  Directors of the Company (the  "Board")
which  consists  of not fewer than two  members  of the  Board.  If any class of
equity  securities  of  the  Company  is  registered  under  section  12 of  the
Securities Exchange Act of 1934, as amended (the "1934 Act"), all members of the
Committee  will be  "Non-Employee  Directors" as defined in Rule  16b-3(b)(3)(i)
promulgated  under the 1934 Act (or any successor rule of like tenor and effect)
and "outside directors" as defined in Section 162(m) of the Code and regulations
promulgated thereunder.

                  (b) Subject to the  provisions  of the Plan,  the Committee is
authorized  to  establish,  amend and rescind such rules and  regulations  as it
deems appropriate for its conduct and for the proper administration of the Plan,
to make all  determinations  under  and  interpretations  of,  and to take  such
actions in connection  with,  the Plan or the Options  granted  thereunder as it
deems necessary or advisable.  All actions taken by the Committee under the Plan
are final and binding on all persons.  No member of the  Committee is liable for
any action taken or determination  made relating to the Plan, except for willful
misconduct.

                  (c) The Company will  indemnify  each member of the  Committee
against costs,  expenses and liabilities (other than amounts paid in settlements
to which the Company does not consent,  which  consent will not be  unreasonably
withheld)  reasonably  incurred by such member in connection  with any action to
which  he or she  may be a  party  by  reason  of  service  as a  member  of the
Committee,  except in  relation  to matters as to which he or she is adjudged in
such action to be personally  guilty of negligence or willful  misconduct in the
performance of his or her duties.  The foregoing right to  indemnification is in
addition to such other rights as the  Committee  member may enjoy as a matter of
law, by reason of insurance coverage of any kind, or otherwise.

          4.      Eligibility.

                  (a) The Committee  may grant Options and Tax Offset  Payments,
as defined in  paragraph  10, to such key  employees of (or, in the case of NSOs
only, to directors who are not employees of and to consultants  and advisers who
render  services to) the Company or its  subsidiaries or parent as the Committee
may select from time to time (the  "Optionees").  The  Committee  may grant more
than one Option to an individual under the Plan.

                  (b) No ISO may be granted to an individual who, at the time an
ISO is granted,  is  considered  under  section  422(b)(6) of the Code as owning
stock  possessing more than 10 percent of the total combined voting power of all
classes of stock of the Company or of its parent or any  subsidiary  corporation
(a "10% Shareholder");  provided, however, this restriction will not apply if at

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the time such ISO is granted the option  price per share of such ISO is at least
110% of the fair market  value of such  share,  and such ISO by its terms is not
exercisable after the expiration of five years from the date it is granted. This
paragraph 4(b) has no application to Options granted under the Plan as NSOs.

                  (c) The aggregate fair market value (determined as of the date
the ISO is granted) of shares with respect to which ISOs are exercisable for the
first time by an Optionee  during any calendar  year under the Plan or any other
incentive  stock  option  plan of the Company or a parent or  subsidiary  of the
Company  may not exceed  $100,000,  or such other  dollar  limitation  as may be
provided in the Code.

         5. Stock Subject to Plan.  The shares subject to Options under the Plan
are the  shares  of  common  stock,  without  par  value,  of the  Company  (the
"Shares").  The Shares issued  pursuant to Options granted under the Plan may be
authorized  and  unissued  Shares,  Shares  purchased on the open market or in a
private  transaction,  or Shares held as treasury stock. The aggregate number of
Shares for which Options may be granted under the Plan may not exceed 1,200,000,
subject to adjustment in accordance  with the terms of paragraph 13 of the Plan.
The maximum  number of Shares for which  Options  may be granted  under the Plan
during  the term of the Plan to any one  individual  may not  exceed  1,200,000,
subject to adjustment in accordance  with the terms of paragraph 13 of the Plan.
The  unpurchased  Shares  subject to terminated or expired  Options may again be
offered under the Plan. The Committee,  in its sole  discretion,  may permit the
exercise of any Option as to full Shares or fractional Shares. Proceeds from the
sale of Shares under Options will be general funds of the Company.

          6.      Terms and Conditions of Options.

                  (a) At the time of grant, the Committee will determine whether
the Options  granted will be ISOs or NSOs.  All Options and Tax Offset  Payments
granted will be authorized by the Committee and,  within a reasonable time after
the date of grant,  will be  evidenced  by stock  option  agreements  in writing
("Stock  Option  Agreements"),  in the form attached  hereto as Exhibit A, or in
such other form and containing such terms and conditions not  inconsistent  with
the  provisions of this Plan as the Committee  may  determine.  Any action under
paragraph 13 may be reflected in an amendment to, or restatement  of, such Stock
Option Agreements.

                  (b)  To  the  extent  permitted  by  applicable  law  and  the
transaction  documents,  the Committee may grant Options and Tax Offset Payments
having terms and provisions  which vary from those specified in the Plan if such
Options or Tax Offset Payments are granted in substitution for, or in connection
with the  assumption  of,  existing  options  granted by (the  Company)  another
corporation  and assumed or  otherwise  agreed to be provided for by the Company
pursuant  to or  by  reason  of a  transaction  involving  a  corporate  merger,
consolidation,  acquisition of property or stock, separation,  reorganization or
liquidation to which the Company is a party.

                  (c) The  adoption of the Plan shall not effect the validity of
any NSO option plan previously adopted by the Company or any unexercised options
currently outstanding pursuant to any such plan.

         7. Price.  The Committee will determine the option price per Share (the
"Option  Price") of each  Option  granted  under the Plan.  Notwithstanding  the
foregoing,  the Option Price of each ISO granted  under the Plan may not be less
than the fair market value of a Share on the date of grant of such  Option.  The
date of grant  will be the date the  Committee  acts to grant the Option or such
later  date  as the  Committee  specifies  and the  fair  market  value  will be
determined without regard to any restrictions other than a restriction which, by
its terms, will never lapse and in accordance with paragraph 25(c).

          8. Option Period. The Committee will determine the period during which
each Option may be exercised (the "Option Period");  provided,  however, any ISO
granted under the Plan will have an Option Period which does not exceed 10 years
from the date of grant.

         9. Nontransferability of Options. An Option will not be transferable by
the Optionee  otherwise than by will or the laws of descent and distribution and
may be exercised,  during the lifetime of the Optionee,  only by the Optionee or
by  the  Optionee's  guardian  or  legal  representative.   Notwithstanding  the
foregoing,  an Optionee  may transfer an NSO either (a) to members of his or her
immediate family (as defined in Rule 16a-1  promulgated  under the 1934 Act), to
one or more trusts for the benefit of such family members, or to partnerships in
which such family  members  are the only  partners,  or (b) if such  transfer is
approved by the Committee.  Any NSOs held by such transferees are subject to the
same terms and  conditions  that applied to such NSOs  immediately  prior to the
transfer.

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         10. Tax Offset Payments. The Committee has the authority and discretion
under the Plan to make cash grants to  Optionees at any time to offset a portion
of the taxes  which may  become  payable  upon  exercise  of NSOs or on  certain
dispositions of Shares acquired under ISOs ("Tax Offset Payments").  In the case
of NSOs,  such Tax  Offset  Payments  will not  exceed an amount  determined  by
multiplying a percentage established by the Committee to approximate the maximum
federal,  state and local income or capital  gains taxes  payable in  connection
with the exercise of the NSO or disposition  of shares  acquired under an ISO by
the difference  between the fair market value of a Share on the date of exercise
and the  Option  Price,  and by the  number of Shares as to which the  Option is
being exercised.  If the Tax Offset Payment is being made in connection with the
disposition  by an Optionee  of Shares  acquired  under an ISO,  such Tax Offset
Payments will be in an amount determined by multiplying a percentage established
by the Committee by the  difference  between the fair market value of a Share on
the date of  disposition,  if less  than the  fair  market  value on the date of
exercise,  and the Option Price,  and by the number of Shares  acquired under an
ISO of which an Optionee is disposing. The percentage will be established,  from
time to time,  by the  Committee at that rate which the  Committee,  in its sole
discretion, determines to be appropriate and in the best interest of the Company
to assist  Optionees  in the  payment  of taxes.  The  Company  has the right to
withhold and pay over to any governmental entities (federal, state or local) all
amounts  under a Tax Offset  Payment  for  payment of any income or other  taxes
incurred on exercise.

         11.      Exercise of Options.

                  (a) The Committee, in its sole discretion,  will determine the
terms and  conditions  of exercise and vesting  percentages  of Options  granted
hereunder.  Notwithstanding  the  foregoing or the terms and  conditions  of any
Stock Option  Agreement to the  contrary,  (i) if the  Optionee's  employment is
terminated as a result of  retirement,  disability or death,  his or her Options
will be  exercisable  to the extent and for the period  specified in  paragraphs
12(b) and 12(c); (ii) if a liquidation or merger occurs, all outstanding Options
will be  exercisable  to the extent and for the period  specified  in  paragraph
13(b); and (iii) if a change in control occurs, all outstanding  Options will be
exercisable for the period specified in paragraph 13(c).

                  (b) An Option may be exercised only upon delivery of a written
notice to any member of the  Committee,  the Company's  President,  or any other
officer of the Company designated by the Committee to accept such notices on its
behalf, specifying the number of Shares for which it is exercised.

                  (c) Within five business  days  following the date of exercise
of an Option,  the Optionee or other person properly  exercising the Option will
make full  payment  of the  Option  Price in cash or,  with the  consent  of the
Committee,  (i) by tendering  previously  acquired Shares (valued at fair market
value, as determined by the Committee,  as of such date of tender);  (ii) with a
full recourse  promissory note of the Optionee for the Option Price, under terms
and  conditions  determined  by the  Committee;  (iii)  any  combination  of the
foregoing;  or (iv) if the Shares  subject to the  Option  have been  registered
under the  Securities  Act of 1933,  as amended  (the "1933 Act") and there is a
regular  public market for the Shares,  by delivering to the Company on the date
of exercise of the Option written notice of exercise together with:

                           (A)  written  instructions  to forward a copy of such
                  notice  of  exercise  to a broker or  dealer,  as  defined  in
                  section  3(a)(4)  and  3(a)(5)  of the  1934  Act  ("Broker"),
                  designated  in such  notice and to  deliver  to the  specified
                  account  maintained  with the Broker by the person  exercising
                  the Option a  certificate  for the Shares  purchased  upon the
                  exercise of the Option, and

                           (B) a copy of irrevocable  instructions to the Broker
                  to deliver promptly to the Company a sum equal to the purchase
                  price of the Shares  purchased upon exercise of the Option and
                  any  other  sums  required  to be  paid to the  Company  under
                  paragraph 17 of the Plan.

                  (d) If Tax Offset Payments sufficient to allow for withholding
of taxes are not being made at the time of exercise of an Option,  the  Optionee
or other person  exercising  such Option will pay to the Company an amount equal
to the  withholding  amount  required to be made less any amount withheld by the
Company under paragraph 17.

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         12.      Termination of Employment.

                  (a) If an Optionee is no longer  employed by the Company,  any
parent or subsidiary of the Company, or any successor  corporation to either the
Company or any parent or  subsidiary  of the  Company,  all Options held by such
Optionee will terminate at the time of  termination  of employment,  unless such
employment has been terminated by reason of retirement  death or disability,  as
defined in paragraph  27(b),  or such  employment  has been  terminated  without
cause.

                  (b) Upon  termination  of  employment  by  reason  of death or
disability or upon  termination  without  cause,  the Optionee or the Optionee's
personal  representative,  or the  person or  persons  to whom his or her rights
under the Options pass by will or the laws of descent or distribution, will have
three  months  after  the  date of such  termination  (but  not  later  than the
expiration  date of the Optionee's  Stock Option  Agreement(s))  to exercise all
Options held by Optionee to the extent the same were  exercisable on the date of
termination;  provided,  however,  the Committee,  in its sole  discretion,  may
permit the exercise of all or any portion of any Option granted to such Optionee
not otherwise exercisable.

                  (c) For options  granted  prior to  December  14,  1999,  upon
termination of employment by reason of retirement,  the Optionee will have three
months  after the date of such  termination  (but not later than the  expiration
date of the Optionee's  Stock Option  Agreement(s)) to exercise all Options held
by Optionee to the extent the same were  exercisable  on the date of termination
and  provided  further  that any option  exercised  more than three months after
retirement  shall  be  considered  to be a NSO  even  though  it may  have  been
originally granted as an ISO; for options granted on or after December 14, 1999,
upon  termination of employment by reason of retirement,  the Optionee will have
thirty-six  months  after the date of such  termination  (but not later than the
expiration  date of the Optionee's  Stock Option  Agreement(s))  to exercise all
Options held by Optionee to the extent the same were  exercisable on the date of
termination  and  provided  further  that any option  exercised  more than three
months after  retirement shall be considered to be a NSO even though it may have
been originally granted as an ISO.

         13.      Reorganizations.

                  (a) If a stock split, stock dividend,  combination or exchange
of shares,  exchange  for other  securities,  reclassification,  reorganization,
redesignation  or other  change  in the  Company's  capitalization  occurs,  the
Committee  will  proportionately  adjust or substitute  the aggregate  number of
Shares for which  Options may be granted  under this Plan,  the number of Shares
subject to  outstanding  Options and the Option  Price of the Shares  subject to
outstanding  Options to reflect  the same.  The  Committee  will make such other
adjustments  to the  Options,  the  provisions  of the Plan and the Stock Option
Agreements as may be appropriate  and equitable,  which  adjustments may provide
for the elimination of fractional Shares.

                  (b) If the Company liquidates or dissolves, or is a party to a
merger or consolidation  in which the Company is not the surviving  corporation,
other  than a  merger  or  consolidation  involving  only a  change  in state of
incorporation or an internal  reorganization  not involving a change in control,
the Company may give written  notice  thereof to all holders of Options  granted
under the Plan at least 30 days prior to the effective date of such liquidation,
dissolution,  merger or  consolidation,  and each  Optionee  will have the right
within such  30-day  period to  exercise  all Options  held by him or her to the
extent the same were exercisable on the date of the notice or became exercisable
within such 30-day notice period;  provided,  however, that such Options may not
be  exercised  after the specific  expiration  date set forth  therein.  If such
Options  have not been  exercised  on or prior to the end of the  30-day  notice
period, they will terminate on that date.

                  (c) If a change in control  (as  defined in  paragraph  25(a))
occurs, all outstanding  Options granted under this Plan will become immediately
exercisable to the extent of 100% of the Shares subject thereto  notwithstanding
any  contrary  waiting  or  vesting  periods  specified  in this  Plan or in any
applicable Stock Option Agreement.  If an outstanding option is not exercised as
a result of a change in control a successor  corporation  shall issue substitute
options so as to preserve substantially the rights and benefits of the Optionees
under this Plan.

         14.      Rights  as  Shareholder.  The  Optionee  has  no  rights  as a
shareholder  with  respect to any Shares  subject to an Option until the date of
issuance of a stock certificate to the Optionee for such Shares.

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         15. No Contract of Employment.  Nothing in the Plan or in any Option or
Stock  Option  Agreement  confers on any  Optionee  any right to continue in the
employment  or service of the Company or any parent or subsidiary of the Company
or  interfere  with the  right  of the  Company  to  terminate  such  Optionee's
employment or other services at any time. The  establishment of the Plan will in
no way, now or hereafter,  reduce, enlarge or modify the employment relationship
between the Company or any parent or subsidiary of the Company and the Optionee.
Options  granted  under the Plan will not be affected by any change of duties or
position as long as the Optionee  continues to be employed by the Company or any
parent or subsidiary of the Company.

         16. Agreements and Representations of Optionees.  As a condition to the
exercise of an Option, the Committee, in its sole determination, may require the
Optionee to  represent  in writing  that the Shares  being  purchased  are being
purchased  only for investment and without any present intent at the time of the
acquisition of such Shares to sell or otherwise dispose of the same.

         17.  Withholding  Taxes. The Company or any parent or subsidiary of the
Company  has the  right  (a) to  withhold  from  any  salary,  wages,  or  other
compensation  for services payable by the Company or any parent or subsidiary of
the Company to or with respect to an Optionee,  or to demand and receive payment
from the Optionee or other person to whom the Company is delivering certificates
for Shares  purchased  upon  exercise  of an Option of,  amounts  sufficient  to
satisfy any federal,  state or local  withholding tax liability  attributable to
such Optionee's (or any beneficiary's or personal  representative's)  receipt or
disposition of Shares  purchased  under any Option or (b) to take any such other
action as it deems  necessary  to enable it to satisfy any such tax  withholding
obligations as a condition to the Company's  obligation to deliver  certificates
evidencing the Shares.  The  Committee,  in its sole  discretion,  may permit an
Optionee to elect to have Shares that would be acquired upon exercise of Options
(valued at fair market value as of the date of exercise) withheld by the Company
and not issued to  Optionee  upon  exercise of Options in  satisfaction  of such
Optionee's  withholding tax  liabilities.  Such withheld Shares will then become
authorized but unissued shares or treasury shares of the Company,  at the option
of the Company.

         18. Exchanges.  The Committee may permit the voluntary surrender of all
or a portion of any Option  granted  under the Plan to be  conditioned  upon the
granting to the  Optionee of a new Option for the same or a different  number of
Shares as the Option  surrendered,  or may require such voluntary surrender as a
condition precedent to a grant of a new Option to such Optionee.  Subject to the
provisions of the Plan,  such new Option will be  exercisable at the same price,
during such period and on such other terms and  conditions  as are  specified by
the Committee at the time the new Option is granted. Upon surrender, the Options
surrendered will be cancelled, and the Shares previously subject to them will be
available  for the grant of other  Options.  The  Committee  also may but is not
obligated to grant Tax Offset Payments to any Optionee  surrendering such Option
for a new Option.

         19.  Compliance  with Laws and  Regulations.  The  Plan,  the grant and
exercise of Options  thereunder,  and the  obligation of the Company to sell and
deliver the Shares under such Options, will be subject to all applicable federal
and state laws, rules and regulations and to such approvals by any government or
regulatory  agency as may be  required.  Options  issued under this Plan are not
exercisable  prior to (i) the date upon which the  Company  has  registered  the
Shares for which Options may be issued under the 1933 Act and the  completion of
any  registration or qualification of such Shares under state law, or any ruling
or regulation of any government body which the Company,  in its sole discretion,
determines to be necessary or advisable in connection therewith, or (ii) receipt
by the  Company  of an opinion  from  counsel to the  Company  stating  that the
exercise of such Options may be effected without  registering the Shares subject
to such Options under the l933 Act or under state or other law.

         20.      Assumption.  The  Plan  may be  assumed by the  successors and
assigns of  the  Company.  Any such  assumption will  not abrogate the rights of
the Company and the Optionees set forth in paragraph 13(b) of the Plan.

         21.      Expenses.  The Company  will  bear  all  expenses and costs in
connection with administration of the Plan.

         22. Amendment,  Modification and Termination of the Plan. The Board may
terminate,  amend or modify the Plan at any time without  further  action on the
part  of the  shareholders  of  the  Company;  provided,  however,  that  (a) no
amendment to the Plan may cause the ISOs granted hereunder to fail to qualify as
incentive  stock options under the Code; and (b) any amendment to the Plan which

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requires the approval of the  shareholders  of the Company  under the Code,  the
regulations  promulgated thereunder or the rules promulgated under section 16 of
the 1934 Act will be subject to approval by the  shareholders  of the Company in
accordance  with  the  Code,  such  regulations  or such  rules.  No  amendment,
modification  or termination of the Plan may adversely  affect in any manner any
Option  previously  granted to an Optionee under the Plan without the consent of
the Optionee or a permitted transferee of such Option.

         23. Term of Plan. The Plan will become effective on the Effective Date,
subject to the  approval  of the Plan by the holders of a majority of the shares
of stock of the Company entitled to vote within twelve months of the date of the
Plan's  adoption by the Board,  and the exercise of all Options granted prior to
such approval will be subject to such  approval.  The Plan will terminate on the
tenth  anniversary  of the  Effective  Date,  or  such  earlier  date  as may be
determined by the Board.  Termination of the Plan, however,  will not affect the
rights of Optionees under Options  previously granted to them, and all unexpired
Options  will  continue in force and  operation  after  termination  of the Plan
except as they may lapse or  terminate by their own terms and  conditions  or as
herein provided.

         24.  Limitation of  Liability.  The liability of the Company under this
Plan  or in  connection  with  any  exercise  of an  Option  is  limited  to the
obligations  expressly set forth in the Plan and in any Stock Option Agreements,
and no term or provision of this Plan or of any Stock Option  Agreements will be
construed to impose any further or additional  duties,  obligations  or costs on
the Company not expressly set forth in the Plan or the Stock Option Agreements.

         25.      Relationship  to Other  Benefits.  No payment under this Plan
shall  be  taken  into  account in  determining  any benefits under any pension,
retirement, profit sharing, or group insurance plan of the Company.

         26.  Nonexclusivity  of Plan.  Neither the  adoption of the Plan by the
Board nor the  submission  of the Plan to the  stockholders  of the  Company for
approval shall be construed as (i) effecting the validity of any existing stock,
option or employee  benefit  plan of the Company or any  unexercised  options or
right  outstanding  thereunder or (ii) creating any  limitations on the power of
the Board to adopt such other  incentive  arrangements as it may deem desirable,
including,  without  limitation,  the granting of stock options  otherwise  than
under the Plan, and such arrangements may be applicable either generally or only
in specific cases.

         27.      Definitions.

                  (a) Change In Control. A "change in control" will be deemed to
have occurred if and when (i) a person, partnership, corporation, trust or other
entity ("Person")  acquires or combines with the Company,  or 50 percent or more
of its  assets or earning  power,  in one or more  transactions,  and after such
acquisition  or  combination,  less than a majority  of the  outstanding  voting
shares of the Person  surviving such  transaction (or the ultimate parent of the
surviving  Person) is owned by the owners of the  voting  shares of the  Company
outstanding immediately prior to such acquisition or combination; or (ii) during
any period of two  consecutive  years during the term of this Plan,  individuals
who at the  beginning of such period are members of the Board  ("Original  Board
Members")  cease for any reason to  constitute at least a majority of the Board,
unless the  election of each Board  member who was not an Original  Board Member
has been approved in advance by Board members  representing at least  two-thirds
of the Board members then in office who were Original Board Members.

                  (b)  Disability.  The term  "disability"  means a physical  or
mental  condition  which  impairs  the  ability of the  Optionee  to perform the
Optionee's  usual and  customary  employment  or service with the Company or any
parent or subsidiary of the Company.

                  (c) Fair Market Value. If the Shares are publicly traded,  the
term "fair market value" as used in this Plan means (i) the closing price quoted
in the NASDAQ National Market, if the shares are so quoted,  (ii) the last quote
reported by NASDAQ for small-cap issues, if the shares are so quoted,  (iii) the
mean between the bid and asked  prices as reported by NASDAQ,  if the Shares are
so  quoted,  or (iv) if the  Shares are  listed on a  securities  exchange,  the
closing price at which the Shares are quoted on such  exchange,  in each case at
the close of the date  immediately  before the Option is granted or, if there be
no quotation or sale on that date,  the next  preceding date on which the Shares
were  quoted or  traded.  In all other  cases,  the fair  market  value  will be
determined  in  accordance  with  procedures  established  in good  faith by the
Committee  and with respect to ISOs,  conforming  to  regulations  issued by the
Internal Revenue Service regarding incentive stock options.

                                      A-6
<PAGE>

                  (d)   Key Employees.   The  term  "key employees"  means those
executive,  administrative,  operational  and   managerial   employees  who  are
determined by the Committee to be eligible for Options under the Plan.

                  (e) Retirement.  The term "retirement" shall mean, in the case
of an employee,  the retirement from the employ of the Company under one or more
of the  retirement  plans of the Company  and, in the case of a director,  shall
mean the date when the  director  is no longer  serving as a member of the Board
and is no longer eligible to be re-elected as a director of the Company pursuant
to the  mandatory  retirement  provisions  of the  Company's  by-laws  and other
applicable law.

                  (f)  Parent  and  Subsidiary.    The  terms  "subsidiary"  and
"parent" as used in the Plan  have the respective meanings set forth in sections
424(f) and (e) of the Code.

                                      A-7
<PAGE>

                            OAK HILL FINANCIAL, INC.
                             STOCK OPTION AGREEMENT
                                    UNDER THE
                             1995 STOCK OPTION PLAN

         OAK HILL FINANCIAL,  INC. (the "Company") hereby grants, effective this
day of  ___________  200__ (the  "Effective  Date") to  __________________  (the
"Optionee")  an option to  purchase  _____________  shares of its common  stock,
without par value (the "Option  Shares"),  at a price of  ______________________
Dollars  ($______) per share  pursuant to the  Company's  1995 Stock Option Plan
(the "Plan"), subject to the following:

         1.  RELATIONSHIP  TO THE PLAN.  This option is granted  pursuant to the
Plan, and is in all respects subject to the terms, provisions and definitions of
the Plan and any amendments thereto. The Optionee acknowledges receipt of a copy
of the  Plan and  represents  that he or she is  familiar  with  the  terms  and
conditions  thereof.  The Optionee  accepts this option subject to all the terms
and provisions of the Plan (including without limitation  provisions relating to
nontransferability,   exercise  of  the  option,  sale  of  the  option  shares,
termination  of the option,  adjustment  of the number of shares  subject to the
option, and the exercise price of the option).  The Optionee further agrees that
all  decisions  and  interpretations  made by the Stock  Option  Committee  (the
"Committee"),  as  established  under  the  Plan,  and  as  from  time  to  time
constituted, are final, binding, and conclusive upon the Optionee and his or her
heirs. This option is not an Incentive Stock Option under the Plan.

         2. TIME OF EXERCISE.  This option may be exercised,  from time to time,
in full or in part,  by the  Optionee  after  the  Effective  Date  and  remains
exercisable  (subject to the  provisions  herein and the Plan) until it has been
exercised  as to all of  the  Shares  or the  tenth  (10th)  anniversary  of the
Effective Date,  whichever  occurs first.  Notwithstanding  the foregoing,  this
option may not be exercised  unless (i) the Option Shares are  registered  under
the  Securities Act of 1933, as amended,  and are registered or qualified  under
applicable state securities or "blue sky" laws, or (ii) the Company has received
an  opinion of  counsel  to the  Company  to the  effect  that the option may be
exercised  and  Option  Shares  may be issued by the  Company  pursuant  thereto
without such  registration  or  qualification.  If this option is not  otherwise
exercisable  by  reason  of  the  foregoing  sentence,  the  Company  will  take
reasonable steps to comply with applicable state and federal  securities laws in
connection with such issuance.

         3. METHODS OF EXERCISE.  This option is  exercisable by delivery to the
Company of written notice of exercise which specifies the number of shares to be
purchased and the election of the method of payment therefor,  which will be one
of the methods of payment  specified in paragraph  11(c) of the Plan. If payment
is otherwise  than payment in full in cash,  the method of payment is subject to
the  consent of the  Committee.  Upon  receipt  of payment  for the shares to be
purchased  pursuant to the option or, if applicable,  the shares to be delivered
pursuant to the  election of an  alternative  payment  method,  the Company will
deliver or cause to be delivered to the Optionee, to any other person exercising
this  option,  or to a broker or dealer if the  method of payment  specified  in
clause  (iv) of  paragraph  1l(c)  of the  Plan is  elected,  a  certificate  or
certificates for the number of shares with respect to which this option is being
exercised, registered in the name of the Optionee or other person exercising the
option,  or if  appropriate,  in the name of such  broker or  dealer;  provided,
however,  that if any law or regulation or order of the  Securities and Exchange
Commission  or other body having  jurisdiction  over the exercise of this option
will require the Company or Optionee (or other person exercising this option) to
take any action in connection with the shares then being purchased, the delivery
of the certificate or certificates for such shares may be delayed for the period
necessary to take and complete such action.

         4. ACQUISITION FOR INVESTMENT.  This option is granted on the condition
that the  acquisition of the Option Shares  hereunder will be for the account of
the Optionee (or other person  exercising  this option) for investment  purposes
and not with a view to resale or  distribution,  except that such condition will
be inoperative  if the Option Shares are registered  under the Securities Act of
1933,  as amended,  or if in the opinion of counsel for the Company  such shares
may be resold without  registration.  At the time of any exercise of the option,
the Optionee (or other person  exercising this option) will execute such further
agreements as the Company may require to implement  the foregoing  condition and
to  acknowledge  the  Optionee's  (or  such  other  person's)  familiarity  with
restrictions  on the resale of the Option  Shares  under  applicable  securities
laws.

                                      A-8
<PAGE>

         5.  DISPOSITION  OF SHARES.  The  Optionee or any other  person who may
exercise  this option will notify the Company  within seven (7) days of any sale
or other transfer of any Option Shares. If any class of equity securities of the
Company is registered  pursuant to section 12 of the Securities  Exchange Act of
1934,  as amended,  and the Optionee or any other  person who may exercise  this
option is  subject to  section  16 of that Act by virtue of such  Optionee's  or
person's  relationship to the Company,  the Optionee or other person  exercising
this Option agrees not to sell or otherwise  dispose of any Option Shares unless
at least six (6) months have elapsed from the Effective Date.

         6.  WITHHOLDING.  As a condition  to the  issuance of any of the Shares
under  this  Option,  Optionee  or any  person  who  may  exercise  this  Option
authorizes  the Company to withhold in accordance  with  applicable law from any
salary,  wages or other  compensation  for services payable by the Company to or
with  respect to  Optionee  any and all taxes  required  to be  withheld  by the
Company under federal, state or local law as a result of such Optionee's or such
person's receipt or disposition of Shares  purchased under this Option.  If, for
any reason,  the Company is unable to withhold  all or any portion of the amount
required to be withheld,  Optionee (or any person who may exercise  this Option)
agrees to pay to the Company upon exercise of this Option an amount equal to the
withholding  required  to be made  less  the  amount  actually  withheld  by the
Company.

         7. GENERAL.  This  Agreement  will be construed as a contract under the
laws of the State of Ohio without  reference to Ohio's  choice of law rules.  It
may be  executed  in  several  counterparts,  all of which will  constitute  one
Agreement.  It will bind and,  subject  to the  terms of the Plan,  benefit  the
parties and their respective successors, assigns, and legal representatives.

         IN WITNESS  WHEREOF,  the Company and the Optionee  have  executed this
Agreement as of the date first above written.

OPTIONEE                                   OAK HILL FINANCIAL, INC.

                                           By:
---------------------                         ---------------------------------

                                      A-9

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