... grinders, aggressively remove material by grinding on the perip Grinding Wheel/Abrasive disc, grinding, Dia. 4.5 In., Thickness 1/4 ... ., Arbor Size 7/8 In., Abrasive Material Aluminum Oxide, 24 Grit, Resin Bond Type, Max. RPM 16,616, For Use With ... .Abrasive MaterialAluminum OxideGrit24Bond TypeResinMax. RPM16,616ApplicationGeneral Purpose MetalCountry of OriginChina grit grinding wheel