Norton 4 1/2" X .035" X 7/8" Cut-off Wheel - Metal (Pack of 25) 4.5" Diameter Metal Cutting Wheel Type 01/41 straight cut-off wheels are designed for use on right-angle grinder cut-off applications. Good choice for grinding alloys, metals, steels, and ferrous metals Quality aluminum oxide - Consistent performance 13,580 Max RPM - Complies With ANSI B7.1