Peer-Vigor	Made in Switzerland for Grobet USA
Dumont	Made at the Dumont factory in Switzerland
Grobet USA	Value Priced - Made in the Grobet factory in the USA

How to Select Tweezers
For handling miniature and micro-miniature parts and assemblies, tweezers are as essential as the fingers on your hand. There are definite differences in their patterns. Point finish and the materials used make some numbers more suitable for a particular job than others. To help in making the proper selection, the information in the charts on this page can be used as a general guide.

Dumont Style Tweezers
Precision watchmakers' tweezers. These tweezers are forged from the finest grades of metal and machined to a smooth satin finish. Extensive hand operations are used in shaping, adjusting and finishing the points, making them the only ones recommended for work under a microscope. Because of the small size of the points, it would be difficult to illustrate the differences; therefore, the chart below should be used for quick comparisons.

Points		Shanks		Length
Tips	Finish	Profile	Edges	Inches	mm	Patterns
Needle Sharp	Micro-Honed	Indented	Beveled	4-1/2	114	4 ,5, 5A
Very Sharp	Fine-Honed	Tapered	Beveled	4-3/4	120	3
Very Sharp	Fine-Honed	Tapered	Beveled	4-1/2	114	3C
Very Sharp	Fine-Honed	Tapered	Flat	4-1/2	114	O
Very Sharp	Fine-Honed	Tapered	Flat	3-1/2	89	OC
Sharp	Honed	Curved	Beveled	4-1/2	114	7, 7A, 7B
Sharp	Honed	Tapered	Beveled	4-3/4	120	1, 11N
Sharp	Honed	Hooked	Flat	4-1/2	114	6
Blunt	Honed	Indented	Flat	4-3/4	120	2
Blunt	Honed	Tapered	Flat	4-3/4	120	OO
Rounded	Honed	Tapered	Flat	3-1/2	89	H
Rounded	Honed	Indented	Flat	4-3/4	120	2A
Beveled	Honed	Straight	Flat	4-1/4	108	8
Cutting	Honed	End Nipper	End Nipper	4-1/4	108	15
Cutting	Honed	Oblique Nipper	Oblique Nipper	4-1/2	114	15A, 15AP

Boley Style Tweezers
Excellent tweezers, with less extensive hand craftsmanship than is devoted to the Dumont style. The matched points have received finishing at the tips making them suitable for sorting and assembly operations of small parts and components under low power magnification.

Diamond Tweezers
Tweezers with finely serrated jaws that grip and hold even the most delicate objects securely without damage. Used extensively for handling diamonds.

Special Purpose Tweezers
Miscellaneous tweezers such as jewel holders, three-prong holders, pocket tweezers, vacuum pickup, etc.

Metals Used
The chart below shows general property relationships among the various metals used in the manufacturing of tweezers. In addition, note that the points of the harder metals will wear longer and are less subject to bending. The softer metals will not scratch delicate parts and usually have additional desirable properties such as being non-magnetic, etc.

Metal	Hardness	Non-Magnetic	Corrosion or Acid Resistance
Carbon Steel	Very hard	No	Poor
Stainless Steel	Hard	No	Satisfactory
Non-Mag Stainless	Soft	Yes	Good
German Silver	Very soft	Yes	Fair
Brass	Very soft	Yes	Fair
Titanium	Hard	Yes	Good
Carpenter 20	Medium	Yes	Excellent

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