3504050

This 3mm round x 100mm long Ruby Midget File is extremely useful when working on precision work with high detail. You can use them with a pin vise or break into smaller length and cement it onto a different holder (not included).  Ruby Stones are always the ideal choice for deburring, blending, dressing, and fine polishing of molds & dies made of hard metals such as hardened tool steel, carbide and surgical stainless-steels. Jewelers use them for sharpening of carbide and high-speed steel engravers and other tools.  Measures 3mm round x 100mm long (approx. 0.12" x 4") Ruby stone dimensions have tolerance of ±0.1mm.