Gator GatorBlade Metal Grinding Wheel 4 in *Diameter: 4 in. *Thickness: 1/4 in. thick *Arbor Size: 5/8 in. *Product Type: Metal Grinding Wheel *Number in Package: 1 pc. *Material: Aluminum Oxide *Arbor Type: Type 27 *Maximum Speed: 15300 rpm *Compatibility: Angle Grinders *Usage: Metal *Packaging Type: Bulk *Discovery NBR, SUP, EXP