Milwaukee® Cutting Wheel, High Speed, 14 in Wheel Diameter, 1/8 in Wheel, 1 in Center Hole, A24R Grit, Coarse Grade, Aluminum Oxide Abrasive, 5400 rpm Maximum, Resinoid Bond, Applicable Materials: Metal and Stainless Steel, Wheel Type Number: Type 1, Wheel Hardness: R - Milwaukee's comprehensive offering of grinding and cutting wheels consists of 45 unique products ranging in diameters from 4-1/2 in. to 14 in., with arbor configurations of 7/8 in., 20 mm, 1 in. and 5/8 in., 11. Milwaukee's abrasive offering is manufactured using three types of abrasive grains, aluminum oxide, silicon Carbide, and zirconia alumina, providing products for general purpose to specialized high performance applications.