Depressed Center Wheel,Type 27 wheels, designed for use on angle grinders, aggressively remove material by grinding on the perip Grinding Wheel/Abrasive disc ... /8 In., Abrasive Material Aluminum Oxide, 24 Grit, Resin Bond Type, Max. RPM 16,616, For Use With Angle Grinder, Fast ... OxideGrit24Bond TypeResinMax. RPM16,616ApplicationGeneral Purpose MetalCountry of OriginChina grit grinding wheel