ITEM NAME:12PCS 1/8 Inch Shank HSS Router Bit Rotary Burr File Milling Drill Cutter Set Material:HSS Color: Silver Feature: 12 pcs Rotary File Set For Rotary Tools Purpose: stone carving, jade carving, grinding, polishing Use Range: Clean flash, burrs during casting, forging, welding,etc Carving of a variety of metals and non-metallic Finishing various metal abrasives,Impeller track,machinery inner hole surface Safety Tips 1. Car.12 pcs Rotary File Set For Rotary Tools. 1x Set(12 Pcs)Rotary Bits. Cutting direction should move from right to left smoothly, do not cut back and forth as using the wheel;. Clean flash, burrs during casting, forging, welding,etc.