carving bit works well for projects like metal or glass engraving, stone carving, or removing flash from castings. The cylinder shape of the carving bit allows for deep removal of material, cutting flat areas, rounding edges as well as making stop cuts and V-cuts. The accessory tip makes flat bottom slots and grooves, flat side cuts, and makes V-cuts when held at 45-degrees. How to use: Let the accessory and your Dremel Multi-Tool do the work without forcing or pushing too hard. For an effective result, use the sides of the accessory head at an angle less than 90 degrees. Do you feel the accessory is chattering more than removing material? Turn up the RPM to achieve a smoother result. Do not use the 9901DM for drilling or enlarging holes that are less than twice the diameter of the accessory. The surface of the tool can easily catch the side of a hole and break the bit. Recommended speed (RPM): • Hardwood: 18-24.000 • Softwood: 25-35.000 • Aluminium/brass: 12-17.000 • Shell/stone: 18-2