Metabo® Bench Grinding Wheel, General Purpose, 8 in Wheel dia, 1 in Wheel Thickness, 1-1/4 in Center Hole, A24 Grit, Coarse Grade, Aluminum Oxide Abrasive, 3600 rpm Maximum, Vitrified Bond, Applicable Materials: Steel, Wheel Type Number: Type 1 Metabo® 655414000 General Purpose Bench Grinding Wheel with Nested Bushing, 8 in dia x 1 in Thick, 1-1/4 in Center Hole, A24 Grit, Aluminum Oxide Abrasive