2Tweezers Reference Page
Material

The high quality microdissecting tweezers on the following pages are available in a number of different steel alloys. Whichalloy to choose is very important and depends on how you intend to use the tweezer. The information below is provided tohelp compare the various alloys and their respective properties. Please note that not all tweezer patterns are available in allalloys.
CARBON STEEL:At Rockwell 60, carbon steel is one of the hardest tweezer steels. Carbon steel tips are very
durable but because of this hardness, carbon steel tips are more brittle than some of the othersteels. Carbon steel is also highly magnetic and stains easily.

TITANIUM:

While not as hard as some of the other alloys (Rockwell 37 at tips), titanium tips are very flexible.
Another unique property of titanium is that it is 33% lighter than other stainless alloys. Titanium
is extremely corrosion and stain resistant, making it the preferred choice for salt water uses.
Titanium also has a high heat resistance in excess of 400ºC and is completely non-magnetic.

INOX:

Inox is a specific stainless alloy composed of carbon steel and chromium. Inox tips are more
flexible than pure carbon steel but not as hard (Rockwell 55). Inox has good stain resistance andis magnetic.

DUMOXEL:One of the most popular tweezer alloys, Dumoxel is even more stain resistant than Inox and ishighly corrosion resistant. With a Rockwell 36 at the tips, tweezers made from this alloy havevery soft, flexible tips. Dumoxel is non-magnetic and exhibits high temperature resistance.

DUMOSTAR:This new alloy is a blend of steel, chromium, nickel, cobalt and has many of the best features ofthe other alloys. Dumostar is heat resistant to over 500ºC and is completely non-magnetic.
Dumostar is extremely corrosion resistant and is one of the harder alloys at Rockwell 62. However, because of its unique composition, Dumostar tips are very flexible, are resistant to fatigue,
and are capable of flexing far beyond other alloys without permanently deforming. This alloy isfar superior in overall performance than any other material available today!

Tip Dimensions
Most tweezer patterns are available in two tip styles, namely "standard" and "biologie". The dimensions of each vary by pattern.
In general, the "biologie" tips are about twice as fine at the "standard" tips. Below is a chart showing the tip dimensions of bothstandard and biologie tips by pattern of some of the more popular patterns:

Tip Dimensions (mm)Pattern 1
Pattern 2
Pattern 3
Pattern 4
Pattern 5
Pattern 7
MM 10203040Standard
Width
Thickness

Biologie
WidthThickness

0.20
0.34
0.17
0.13
0.10
0.17xxxxx
x

0.10
0.17
0.08
0.06
0.05
0.07

5060

0.12
0.14
0.10
0.08
0.06
0.10708090

100xxxxxx

0.06
0.07
0.04
0.02
0.01
0.03

110120Please consult the following pages for dimensions of patterns not listed above.
INCHES1234130

5140

150

6160

170

1807190

Micro Dissecting Tweezers

3

Pattern #1
length 120mm
Tip Profile
tip .10 x .06mm
Material: INOX
Biologie Tips

RS-4900

RS-4960

tip .20 x .12mm
Material: Dumostar

RS-5040

tip .20 x .12mm
Material: INOX

RS-4900 Shown

RS-4960 Shown

Pattern #2
length 120mm
Tip Profile
tip .17 x .07mm
Material: INOX
Biologie Tips

RS-4902

RS-4962

tip .34 x .14mm
Material: Dumostar

RS-5041

tip .34 x .14mm
Material: INOX

RS-4902 Shown

RS-4962 Shown

Pattern #3
length 120mm
Tip Profile
tip .08 x .04mm
Material: INOX
Biologie Tips

RS-4903

RS-4964

tip .17 x .10mm
Material: Dumostar

RS-4966

tip .08 x .04mm
Material: Dumostar
Biologie Tips

RS-4966 Shown

tip .17 x .10mm
Material: INOX

RS-5042

190

RS-4903 Shown

180

7170160

150

6140

130

5120110100

49080

70

36050

2403020110MMINCHESMicro Dissecting Tweezers

4

Pattern #3C
length 110mm
Tip Profile

RS-4970 Shown

RS-4968

tip .17 x .10mm
Material: Dumostar

RS-4970

tip .08 x .04mm
Material: Dumostar
Biologie Tips

RS-5043

tip .17 x .10mm
Material: INOX

Pattern #Mini 3
length 70mm
Tip Profile
RS-4913

MM 10

INCHES

2030

14050

26070

80

390100

4110

120

130

5140

tip .08 x .04mm
Material: INOX
Biologie Tips

1506160

170

180

7190

Micro Dissecting Tweezers

5Pattern #4
length 110mm
Tip Profile
tip .06 x .02mm
Material: INOX
Biologie Tips

RS-4904

RS-4972

tip .13 x .08mm
Material: DumostarRS-4974

tip .06 x .02mm
Material: Dumostar

RS-5044

tip .13 x .08mm
Material: INOX

RS-4904 Shown

RS-4972 Shown

Pattern #5 modiﬁedtips closing flat on 4mm
length 110mm
tip .06 x .02mm
half curve
Material: INOX
Biologie Tips

RS-5001

Pattern #5 SF
length 110mm
Tip Profile
tip .025 x .005mm
Material: INOXSuperfine Tips

RS-4955

190

180

7170

160

150

6140130

5120

110

100

490807036050

2403020110MMINCHESMicro Dissecting Tweezers

6

Pattern #5 XL
length 150mm
Tip Profile
RS-4915

tip .06 x .0024mm
Material: INOX

Pattern #5 Ceramic
length 110mm
Tip Profile
RS-4925

MM 10

INCHES2030

1405026070803901004110120130

5140

tip 0.05 x 0.01mm
Material: Black Ceramic
Coated INOX
Biologie Tips

150

6160

170

180

7190

Micro Dissecting Tweezers

7

Pattern #5
length 110mm
Tip Profile
tip .05 x .01mm
Material: INOX
Biologie Tips
Mirrored Finish

RS-4905

RS-4905 Shown

tip .10 x .06mm
Material: Dumostar

RS-4976

RS-4976 Shown

RS-4978

tip .05 x .01mm
Material: Dumostar
Biologie Tips

RS-5015

tip .05 x .01mm
Material: INOX
Biologie Tips

RS-5035

tip .08 x .04mm
Material: Carbon Steel

RS-5045

tip .10 x .06mm
Material: INOX

RS-5050

tip .05 x .01mm
Material: Titanium
Biologie Tips

RS-5055

tip .10 x .06mm
Material: Titanium

RS-5060

tip .05 x .01mm
Material: Dumoxel
Biologie Tips

RS-5065

tip .10 x .06mm
Material: Dumoxel

Pattern #5, 45o angle
length 109mm
Tip Profile
RS-5005

tip .05 x .01mm
Material: INOX
Biologie Tips

RS-5058

tip .10 x .06mm
Material: Dumoxel
RS-5005 Shown190

1807170160150

614013051201101004908070360502403020110MMINCHESMicro Dissecting Tweezers

8Pattern #5, 90o angle
length 106mm
Tip Profile
RS-4919

tip .05 x .01mm
Material: INOX
Biologie Tips

Pattern #5, 15o up
length 105mm
Tip Profile
RS-5045A

tip .10 x .06mm
Material: INOX

Pattern #55
length 110mm
light shanks,
superfine points
Tip Profile

RS-5010 Shown

RS-4984

tip .05 x .01mm
Material: Dumostar
Biologie Tips

RS-5063

tip .05 x .01mm
Material: Dumoxel
Biologie Tips

RS-5010tip .05 x .01mm
Material: INOX
Biologie Tips

Pattern #5A
oblique points
length 115mm
Tip Profile
RS-4928

MM 10

INCHES2030

14050

2607080390100

4110120130

5140

tip .06 x .02mm
Material: INOX
Biologie Tips

1506160

170

180

7190

Micro Dissecting Tweezers

9

Pattern #N5
cross action
superfine points
length 108mm
Tip Profile
tip .05 x .01mm
Material: INOX
Biologie Tips

RS-5020

Pattern #6
length 115mm
Tip Profile
tip .17 x .10mm
Material: INOX

RS-5046

Pattern #7
length 115mm
Tip Profile
tip .07 x .03mm
Material: INOX
Biologie Tips

RS-4907

RS-5047tip .17 x .10mm
Material: INOX

RS-4980

tip .17 x .10mm
Material: Dumostar

RS-4982

tip .07 x .03mm
Material: Dumostar
Biologie Tips

RS-5037

tip .07 x .03mm
Material: Dumoxel
Biologie Tips

RS-5039

tip .07 x .03mm
Material: Titanium
Biologie Tips

RS-5057

tip .17 x .10mm
Material: Titanium

RS-5064

tip .17 x .10mm
Material: Dumoxel

190

180

7170

160

150

6RS-4907 Shown

RS-5047 Shown

140

130

5120

11010049080

70360502403020

110MM

INCHESMicro Dissecting Tweezers

10Pattern #7S short curvelength 117mm
Tip Profile
RS-4935

tip .07 x .03mm
Material: INOX
Biologie Tips

Pattern #N7
cross action
length 115mm
Tip Profile
RS-5027

tip .07 x .03mm
Material: INOX
Biologie Tips

Pattern #SS Long
narrow, delicate
length 135mm
Tip Profile
RS-4940

tip .10 x .06mm
Material: INOX
Biologie Tips

RS-4941

tip .10 x .06mm
45o angle
Material: INOX
Biologie Tips

Pattern #PP
heavy duty
length 135mm
Tip Profile

MM 10

INCHES

2030

14050

2607080

3901004110120

RS-4950

tip .10 x .06mm
Material: INOX
Biologie Tips

RS-4951tip .10 x .06mm
45o Angle
Material: INOX
Biologie Tips

130514015061601701807190

Vessel Cannulation Forceps

11Vessel Cannulation
Forceps

RS-4990

for tubing of .35mm OD
length 131mm
tip width .75mm
tip diameter .35mm
Material: INOX

Vessel Cannulation
Forceps

RS-4991

for tubing of .5mm OD
length 130mm
tip width .9mm
tip diameter .5mm
Material: INOX

Vessel Cannulation
Forceps

RS-4992

for tubing of 1.0mm OD
length 128mm
tip width 1.4mm
tip diameter 1.0mm
Material: INOX

190

1807170160150614013051201101004908070360502403020110MMINCHES

Vessel Dilation Forceps

12Vessel Dilation
Forceps

RS-4927

length 120mm
tip .20 x .16mm

Vessel Dilation
Forceps

RS-4929

length 115mm
tip .20 x .16mm

Vessel Dilation
Forceps

RS-4942length 135mm
tip .20 x .16mm

Corneal Forceps

RS-4952

length 135mm
tip .30 x .30mm
retention holediameter .35mm

MM 10INCHES

2030

140

50

260

70

80

390100

4110

120

130

5140

150

6160

170

180

7190

Ordering Information
Phone

To Order by phone call Toll Free 1-800-424-2984
Our experienced customer support staff will courteously and efficiently
assist you. Our business hours are:
8:30 a.m. to 5:30 p.m. Eastern TimeFaxFax your purchase orders directly to:
Roboz Surgical Customer Service.
1-888-424-3121

Emailinfo@roboz.com

Credit Card

Roboz accepts VISA, Mastercard and American Express

After Hours

Our normal business hours are: 8:30 a.m. to 5:30 p.m. Eastern Time
Monday through Friday. Outside normal hours please leave yourname on our voice mail and a customer service representative will
return your call the next business day.

Holidays & Weekends

Shipping &Handling

We normally ship UPS two day service for a flat rate fee.

Returns

To return any of our products please call us at 1-800-424-2984. Our
customer service staff will arrange for authorization and assist you.
Please use care in packaging delicate items. Also note a 10%
restocking charge may apply.

Terms &Conditions

Net 30 Days

Next day service is available for an additional fee.
Shipping point is Gaithersburg, Maryland.

A 1.5% charge for overdue accounts may apply.
Delivery 2-5 days ARO
F.O.B. Gaithersburg, MD

All instruments intended for research purposes only.