This is a Rough "n Tough Carbide Cutter (Fine 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. Fine grit. Rod shaped. INCLUDES: One Carbide Cutter (Fine Rod) REQUIRES: Dremel High Speed Rotary Tool SPECS: Shank: 1/8" Diameter: 1/8" Comments: Not recommended for use on metal.RobartPart ROB464F