... aggressively remove material by grinding on the perip Grinding Wheel/Abrasive disc, grinding, Dia. 9 In., Thickness 1/4 In ... ., Arbor Size 7/8 In., Abrasive Material Aluminum Oxide, 24 Grit, Resin Bond Type, Max ... .Thickness1/4 In.Arbor Size7/8 In.Abrasive MaterialAluminum OxideGrit24Bond TypeResinMax. RPM8308ApplicationGeneral Purpose MetalCountry of OriginChina abrasive disc grinder