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  Exhibit 4.5    
    

 
 

  [FORM OF NOTICE TO STOCKHOLDERS]    
    
    GRIFFON CORPORATION    
    
    NOTICE TO STOCKHOLDERS WHO ARE RECORD HOLDERS    
    

Up
to 20,000,000 Shares of Common Stock Issuable Upon Exercise of Transferable Rights 

        Enclosed
for your consideration is a prospectus, dated
[                                    ], 2008 (the "Prospectus"), relating to the
offering by Griffon Corporation (the "Company") of transferable rights (the "Rights") to subscribe for
shares of the Company's common stock, par value $0.25 per share ("Common Stock"), by stockholders of record ("Record Date
Stockholders") as of 5:00 p.m., New York City time, on [                        ], 2008 (the
"Record
Date"). 

        Pursuant
to the offering, the Company is issuing Rights to subscribe for 20,000,000 shares of its Common Stock, on the terms and subject to the conditions described in the Prospectus.
The Rights may be exercised at any time during the subscription period, which commences on [                        ], 2008 and
ends at 5:00 p.m., New York City time, on
[                        ], 2008, unless extended by the Company in its sole discretion (as it may be extended, the "Expiration Date").
The Rights are transferable and are listed for trading on the New York Stock Exchange under the symbol "GFF RT" until the Expiration Date. 

        As
described in the Prospectus, Record Date Stockholders will receive one Right for each share of Common Stock owned on the Record Date. The Rights entitle the holders (the  "Rights Holders") to purchase
[            ] shares of Common Stock at the subscription price of $8.50 per share of
Common Stock (the "Subscription Right"). 

        Holders
who fully exercise their rights will be entitled to subscribe for additional shares that remain unsubscribed as a result of any unexercised rights (the  "Over-Subscription Right"). The Over-Subscription
Right allows a rights holder to subscribe for an additional amount equal to up
to 20% of the shares of Common Stock for which such holder was otherwise entitled to subscribe. If sufficient remaining shares of Common Stock are available, all over-subscription requests
will be honored in full. If requests for shares of Common Stock pursuant to the Over-Subscription Right exceed the remaining shares of Common Stock available, the remaining shares of
Common Stock will be allocated pro-rata among Rights Holders who over-subscribe based on the number of Rights then held. Rights may only be exercised for whole numbers of
shares; no fractional shares of Common Stock will be issued in this offering. 

        The
rights will be evidenced by subscription certificates (the "Subscription Certificates"). 

        Enclosed
are copies of the following documents: 

	1.
	Prospectus,
dated [                        ], 2008;

	2.
	Subscription
Certificate; and

	3.
	A
return envelope, addressed to American Stock Transfer & Trust Company (the "Subscription Agent"). 

        Your
prompt attention is requested. To exercise Rights, you should complete and sign the Subscription Certificate and forward it, with payment of the subscription price in full for each
share of Common Stock subscribed for pursuant to the Subscription Right and the Over-Subscription Right to the Subscription Agent, as indicated on the Subscription Certificate. The
Subscription Agent must receive the properly completed and duly executed Subscription Certificate and full payment at or prior to 5:00 p.m., New York City time, on the Expiration Date. 

        You
will have no right to rescind your subscription after receipt of your payment of the subscription price, except as described in the Prospectus. Rights not exercised at or prior to
5:00 p.m., New York City time, on the Expiration Date will expire. 

        ANY QUESTIONS OR REQUESTS FOR ASSISTANCE CONCERNING THE RIGHTS OFFERING SHOULD BE DIRECTED TO MACKENZIE PARTNERS, INC., THE INFORMATION AGENT,
TOLL-FREE AT THE FOLLOWING TELEPHONE NUMBER: (800) 322-2885.

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Exhibit 4.5

[FORM OF NOTICE TO STOCKHOLDERS] GRIFFON CORPORATION NOTICE TO STOCKHOLDERS WHO ARE RECORD HOLDERSQuickLinks
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  Exhibit 4.6    
    

        GRIFFON CORPORATION  

NOTICE TO STOCKHOLDERS WHO ARE ACTING AS NOMINEES  

Up to 20,000,000 Shares of Common Stock Issuable Upon Exercise of Transferable Rights  

        This letter is being distributed to broker-dealers, trust companies, banks and other nominees in connection with the offering by Griffon Corporation (the
"Company") of transferable rights to subscribe for shares of the Company's common stock, par value $0.25 per share ("Common
Stock"), by stockholders of record ("Record Date Stockholders") as of 5:00 p.m., New York City time, on
[            ], 2008 (the "Record Date"). 

        Pursuant
to the offering, the Company is issuing rights (the "Rights") to subscribe for 20,000,000 shares of its Common Stock, on the
terms and subject to the conditions described in the Company's prospectus, dated [            ], 2008 (the "Prospectus"). The
Rights may be exercised by holders thereof (the "Rights Holders") at any time during the subscription period, which commences on
[                        ], 2008 and ends at 5:00 p.m., New York City time, on
[            ], 2008, unless extended by the Company in its sole
discretion (as it may be extended, the "Expiration Date"). The Rights are transferable and are listed for trading on the New York Stock Exchange under
the symbol "GFF RT" until the Expiration Date. 

        The
Company will distribute to you one transferable right for every share of Common Stock that you own on the Record Date. As described in the Prospectus, Rights Holders will be entitled
to purchase
[            ] shares of Common Stock at the subscription price of $8.50 per share of Common Stock (the "Subscription
Right"). 

        Holders
who fully exercise their rights will be entitled to subscribe for additional shares that remain unsubscribed as a result of any unexercised rights (the
"Over-Subscription Right"). The Over-Subscription Right allows a rights holder to subscribe for an additional amount equal to up
to 20% of the shares of Common Stock for which such holder was otherwise entitled to subscribe. If sufficient remaining shares of Common Stock are available, all over-subscription requests
will be honored in full. If requests for shares of Common Stock pursuant to the Over-Subscription Right exceed the remaining shares of Common Stock available, the remaining shares of
Common Stock will be allocated pro-rata among Rights Holders who over-subscribe based on the number of Rights then held. Rights may only be exercised for whole numbers of
shares; no fractional shares of Common Stock will be issued in this offering. 

        The
Rights are evidenced by a subscription certificate (a "Subscription Certificate") registered in your name or the name of your nominee.
Each beneficial owner of shares of the Company's Common Stock registered in your name or the name of your nominee is entitled to one Right for every share of Common Stock owned by such beneficial
owner as of the Record Date. 

        We
are asking persons who hold shares of the Company's Common Stock beneficially, and who have received the Rights distributable with respect to those shares through a broker-dealer,
trust company, bank or other nominee, to contact the appropriate institution or nominee and request it to effect the transactions for them. 

        If
you exercise the Over-Subscription Right on behalf of beneficial owners of Rights, you will be required to certify to the Subscription Agent and the Company, in connection
with the exercise of the Over-Subscription Right, as to the aggregate number of Rights that have been exercised pursuant to the Subscription Right, whether the Rights exercised pursuant to
the Subscription Right on behalf of each beneficial owner for which you are acting have been exercised in full and the number of shares of Common Stock being subscribed for pursuant to the
Over-Subscription Right by each beneficial owner of Rights on whose behalf you are acting. 

        Enclosed
are copies of the following documents: 

	1.
	Prospectus,
dated [            ], 2008,

	2.
	A
form of letter which may be sent to beneficial holders of the Company's Common Stock; and

	3.
	A
Notice of Guaranteed Delivery. 

        Rights
not exercised at or prior to 5:00 p.m., New York City time, on the Expiration Date will expire. 

        Additional
copies of the enclosed materials may be obtained from the Information Agent, MacKenzie Partners, Inc., toll-free at the following telephone number:
(800) 322-2885. 

        NOTHING HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL MAKE YOU OR ANY OTHER PERSON AN AGENT OF THE COMPANY; THE DEALER-MANAGERS, THE SUBSCRIPTION AGENT, THE
INFORMATION AGENT OR ANY OTHER PERSON MAKING OR DEEMED TO BE MAKING OFFERS OF THE SECURITIES ISSUABLE UPON VALID EXERCISE OF THE RIGHTS, OR AUTHORIZE YOU OR ANY OTHER PERSON TO MAKE ANY STATEMENTS ON
BEHALF OF ANY OF THEM WITH RESPECT TO THE OFFERING, EXCEPT FOR STATEMENTS MADE IN THE PROSPECTUS.

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Exhibit 4.6QuickLinks
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  Exhibit 4.7    
    

        [FORM OF NOTICE TO BENEFICIAL STOCKHOLDERS OF COMMON STOCK]  

GRIFFON CORPORATION  

NOTICE TO CLIENTS OF STOCKHOLDERS WHO ARE ACTING AS NOMINEES  

Up to 20,000,000 Shares of Common Stock Issuable Upon Exercise of Transferable Rights

        Enclosed
for your consideration is a prospectus, dated [                        ], 2008 (the "Prospectus"), relating to the
offering by Griffon Corporation (the "Company") of transferable rights to subscribe for shares of the Company's common stock, par value $0.25 per share
("Common Stock"), by stockholders of record ("Record Date Stockholders") as of 5:00 p.m., New
York City time, on [                        ], 2008 (the "Record Date").

        Pursuant
to the offering, the Company is issuing rights (the "Rights") to subscribe for up to 20,000,000 shares of its Common Stock, on
the terms and subject to the conditions described in the Prospectus. The Rights may be exercised by the holders thereof (the "Rights Holders") at any
time during the subscription period, which commences on [                        ], 2008 and ends at 5:00 p.m., New York City
time, on [                        ],
2008, unless extended by the Company in its
sole discretion (as it may be extended, the "Expiration Date"). The Rights are transferable and are listed for trading on The New York Stock Exchange
under the symbol "GFF RT" until the Expiration Date. 

        As
described in the Prospectus, you will receive one Right for each share of Common Stock carried by us in your account on the Record Date. The Rights entitle you to purchase
[            ] shares of Common Stock at the subscription price of $8.50 per share of Common Stock (the "Subscription
Right"). 

        Holders
who fully exercise their rights will be entitled to subscribe for additional shares that remain unsubscribed as a result of any unexercised rights (the  "Over-Subscription Right"). The Over-Subscription
Right allows a rights holder to subscribe for an additional amount equal to up
to 20% of the shares of Common Stock for which such holder was otherwise entitled to subscribe. If sufficient remaining shares of Common Stock are available, all over-subscription requests
will be honored in full. If requests for shares of Common Stock pursuant to the Over-Subscription Right exceed the remaining shares of Common Stock available, the remaining shares of
Common Stock will be allocated pro-rata among Rights Holders who over-subscribe based on the number of Rights then held. Rights may only be exercised for whole numbers of
shares; no fractional shares of Common Stock will be issued in this offering. 

        The
Rights will be evidenced by subscription certificates (the "Subscription Certificates"). 

        Enclosed
are copies of the following documents: 

	1.
	Prospectus,
dated [                        ], 2008; and

	2.
	Beneficial
Owner Election Form. 

        THE MATERIALS ENCLOSED ARE BEING FORWARDED TO YOU AS THE BENEFICIAL OWNER OF COMMON STOCK CARRIED BY US IN YOUR ACCOUNT BUT NOT REGISTERED IN YOUR NAME. EXERCISES
OF RIGHTS MAY ONLY BE MADE BY US AS THE RECORD OWNER AND PURSUANT TO YOUR INSTRUCTIONS.

        Accordingly,
we request instructions as to whether you wish us to elect to subscribe for any shares of Common Stock to which you are entitled pursuant to the terms and subject to the
conditions set forth in the enclosed Prospectus. However, we urge you to read the Prospectus carefully before instructing us to exercise any Rights. Your instructions to us should be forwarded as
promptly as possible in order to permit us to exercise the Rights on your behalf in accordance with the provisions of the offering. The offering will expire at 5:00 p.m., New York City time, on
the Expiration Date. You will have no right to rescind your subscription after receipt of your payment of the subscription price or Notice of Guaranteed Delivery, except as described in the
Prospectus. Rights not exercised at or prior to 5:00 p.m., New York City time, on the Expiration Date will expire. 

        If
you wish to have us, on your behalf, exercise your Rights for any shares of Common Stock to which you are entitled, please so instruct us by completing, executing and returning to us
the Beneficial Owner Election Form included with this letter. 

        ANY QUESTIONS OR REQUESTS FOR ASSISTANCE CONCERNING THE RIGHTS OFFERING SHOULD BE DIRECTED TO MACKENZIE PARTNERS, INC., THE INFORMATION AGENT,
TOLL-FREE AT THE FOLLOWING TELEPHONE NUMBER: (800) 322-2885.

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Exhibit 4.7

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