Detailed Product Description Rotary file, rotary bur, High speed cutters, Ideal for shaping, hollowing, grooving, slotting, inlaying and making tapered holes in soft metals, plastics and woods especially on curved surfaces. Specifications:Bit Diameter Inch 3/32Bit Diameter mm 2,4 mm Finish Color White polishing Description High Speed Cutter Shank Diameter 1/8, 3,2 mm Model Number: 190