... Wheel/Abrasive disc, grinding, Dia. 9 In., Thickness 1/4 In., Arbor Size 7/8 In., Abrasive Material Aluminum Oxide ... , Resin Bond Type, Max. RPM 8308, For Use With Angle Grinder, Fast Metal grindting.For grinding metal,sainless steel,stone,etc ... -6-1Item #DA230-6-1Wheel TypeGrindingDia.9 In.Thickness1/4 In.Arbor Size7/8 In.Abrasive MaterialAluminum OxideGrit24Bond TypeResinMax. RPM8308ApplicationGeneral ...