Merit Abrasives - 3" Disc Diam, 36 Grit, Zirconia Alumina Quick Change Disc - Type S Attaching System, Coated, Blue, Very Coarse Grade, 20,000 RPM

Type S attachment systems feature a turn-on/turn-off style fastener (1/4-1/2 turn to lock in place). They are interchangeable with TS and Type II Styles.

More durable than aluminum oxide, zirconia-alumina is best for medium- to heavy-material removal. The material grains constantly fracture to produce new sharp edges. Commonly used on carbon steels, aerospace alloys, nickel alloys, aluminum, cast iron, forgings and some stainless steels.