Forney 71848 Cut-Off Wheel with 7/8-Inch Arbor, Metal Type 27, A24R-BF, 4-1/2-Inch-by-1/8-Inch Aluminum oxide metal grinding wheel Designed for metal grinding, metal abrasion, body work, metal fabrication and general repair work Used on ferrous materials For use on right angle grinders only Use at a 90-Degree angle