Model: MP21-4-12 - This blade is a ½”, 12mm wide cutter and fits most standard 4-1/2” angle grinders. Cuts smoothly in any direction, forward, backward, and laterally from side to side and has four (4) round, replaceable, tungsten carbide cutting heads (MP21-R-R124S). Removes wood, plastic, and soft, non-ferrous material rapidly. Powered by up to 13,000 rpm from your angle grinder, this cutter more than rapidly removes and shapes material and is excellent for removing and shaping medium to large sculptures. It leaves rounded edges. These 4”-12mm cutters allows for more creativity and adds a phenomenal new dimension to woodturnings and most woodcarvings!