PFERD 66123 Cut-Off Wheel, Stationary, Heavy-Duty, Performance Line SG-ELASTIC, Outside Diameter: 20 Inch, Thickness: 3/16 Inch, Arbor Hole / Thread Size: 1 Inch A.H., Grade: N/P/Q/S, Grit: 24, Abrasive Type: Aluminum Oxide, Max Speed: 3100 Rpm, Mounting: Arbor, Product / Materials Abraded: Steel