1660502 - Pin Vise Double End
Insert a bit or bur of your choice (Ruby, Diamond, Carbide, Steel, etc). Use by hand like a file.
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The catalog didn't give specifics as to what size burs it holds or that it had four ends.The 3/32" is very useful. The 1/16" side, burs side don't exist. The two other ends are far too small for Exacto blades or files that t can find. Disappointed.