Vortec Pro Wolverine Cut-Off Wheel, Small, 3 in Wheel Diameter, 1/16 in Wheel Thickness, 1/4 in Center Hole, A36T Grit, Medium Grade, White Aluminum Oxide Abrasive, 25000 rpm Maximum, Resin Bond, Applicable Materials: Steel, Iron, Concrete, Ductile Iron and other Ferrous Metal, Wheel Type Number: Type 1, Wheel Hardness: T, For Use With: Right Angle Grinders, Reinforced: Yes, Specifications Met: ANSI B7.1.The Vortec Pro bonded abrasive line is specifically designed for general purpose cutting and grinding applications on steel, iron and other ferrous metals. All product is resin bond formulated for aggressive stock removal and fast cutting and are reinforced with fiberglass webbing for stability.