Carbon Steel Rotary Rasp File 1/4" Shank Die Grinders Aggressive and versatile filing bit for wood, plastic & other non-metal materials Durable tempered carbon steel has sharp file teeth notched into surface during manufacture Makes bits VERY efficient at removing excess material, carving, forming and reducing Cylinder rasp 1/2" diameter x 1-3/8"; length overall 2-1/2" 1/4" shank fits all drill chucks, air & power die grinders & more; also in 1/8" shank to fit Dremel