PFERD Cut-Off Wheel, Depressed Center, Series: Performance Line SG-ELASTIC, 4-1/2 in Wheel Diameter, 3/32 in Wheel Thickness, 7/8 in Center Hole, 46 Grit, Medium Grade, Aluminum Oxide Abrasive, 13300 rpm Maximum, Resin Bond, Applicable Materials: Stainless Steel (INOX), Carbon Steel and Ferrous Metal, Wheel Type Number: Type 27, Wheel Hardness: R, For Use With: Angle Grinders