This is a Rough "n Tough Carbide Cutter (Coarse Rod) from Robart. Features: Made of virtually indestructable tungsten carbide bonded on steel shanks. Won"t wear out, load up, break down, or overheat. For use in shaping all woods, plastic, fiberglass and ceramics. Coarse grit. Rod shaped. INCLUDES: One Carbide Cutter (Coarse Rod) REQUIRES: Dremel High Speed Rotary Tool SPECS: Shank: 1/8" Diameter: 1/4" Comments: Not recommended for use on metal.RobartPart ROB463C