New Dremel #612 Piloted Router bit A high-speed router made from high-grade steel. Ideal for routing, inlaying and mortising in wood and other soft materials. 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. - Secure objects to a stable surface while working. - If chattering occurs, increase speed. - Keep a light touch, letting the speed of the tool do the work. This helps your accessory bits last longer. Click on picture to see profile this bit makes