Forney 71843 Cut-Off Wheel with 3/8-Inch Arbor, Metal Type 1, A36T-BF, 3-Inch-by-1/8-Inch Aluminum oxide metal cutting wheel Designed for metal cutting, metal abrasion, body work, metal fabrication and general repair work Used on ferrous materials Designed to be used on right angle grinders only Used typically with high speed die grinder and do not exceed maximum RPM