This Is A Rough "n Tough Carbide Cutter (Coarse Drum) from Robart. Features: Made of virtually indestructable tungsten carbide bonded on steel. Won"t wear out, load up, break down, or overheat. For use in shaping all woods, plastic, fiberglass and ceramics. Coarse grit. Drum shaped. INCLUDES: One Carbide Cutter (Coarse Drum) REQUIRES: Dremel High Speed Rotary Tool Mandrel SPECS: Diameter: 1/2" Comments: Not recommended for use on metal. kr10/22/01 ir/kh