... , Resin Bond Type, Max. RPM 8308, For Use With Angle Grinder, Fast Metal grindting.For grinding metal,sainless steel,stone,etc ... .For Use With Angle Grinder, Fast Metal grinding.Item NO.: DA230-6-1Item #DA230-6 ... MaterialAluminum OxideGrit24Bond TypeResinMax. RPM8308ApplicationGeneral Purpose MetalCountry of OriginChina abrasive disc grinder