Type 01 BlueFire Right Cut Cut-Off Wheel, 4 1/2 in Dia, 1/16 Thick, Alum. Oxide Latest generation NorZon (zirconia alumina) outperforms competitive zirconia by 20% and aluminum oxide by up to 10X on difficult-to-cut metals High-performance resin bond designed for free cut and long life Broad utility for light-to heavy-pressure