Ideal for fine detail work on wood, jade, ceramic, glass, hardened steel and other hard materials. Removes material quickly and easily. User Tips For best results, insert the accessory bit all the way into the tool and then back it out slightly before tightening down. This provides plenty of shank for the collet or chuck to hold onto the bit.Secure objects to a stable surface while workingUse higher speeds for hard woods and slower speeds for metalsIf chattering occurs, increase speed.