Diamond Coated Cylindrical Grinding Mounted Point Bits Burrs Fits Dremel Type Rotary Tool can be used in your rotary hand drill, die grinder, pendant drill, flexible shaft and drill press. Diamond cylindrical dremel bits are a high-speed cutter made of steel tipped with diamond particles. Ideal for fine detail work on wood, jade, ceramic, glass, hardened steel and other hard materials. Removes materialquickly and easily.