ITEM NAME:12mmx25mm Double Cut Cylindrical Alloy Bur Rotary File Bit G4J8 12mmx25mm Double Cut Cylindrical Alloy Bur Rotary File Bit G4J8 The Rotary File can rotate at a very high speed, enabling it to manipulate the material it is working on. Used for grinding, carving and shaping in steel, cast iron, brass, copper, hardwoods, plastics, etc. Suitable for use on most air or electric grinding tools which accept 6mm shanks. Product Name : Rotary File Design : Cylinder Shape, Radius End, Double Cut Cutting Size : 12 x 25 mm / 15/32" x 1" (D*L) Shank Diameter : 6 mm / 15/64" Total Length : 67 mm / 2.6" Material : Alloy Color : Silver Tone, Gray Net Weight : 42g Package Content : 1 x Rotary File Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm.