Forney 71879 Aluminum Oxide 8500 rpm 7 Dia. in. Grinding Wheel 1/4 in. Thick By August 14, 2026 No Comments Used on ferrous materials. For use on right angle grinders. Material: Aluminum Oxide. Maximum Speed: 8500 rpm. Compatibility: Right Angle Grinders. Hand Tools And Tool Accessories. Thickness: 1/4 in. Continue Reading