Forney Metal Grinding Wheel 4-1/2 in. Dia. *Diameter: 4-1/2 in. *Thickness: 1/4 in. thick *Arbor Size: 5/8 in. *ProductType: Metal Grinding Wheel *Number in Package: 1 pc. *Arbor Type: Type 27 *Compatibility: Right Angle Grinders *Material: Aluminum Oxide *Grit: A24R Grit *Maximum Speed: 13300 rpm *Packaging Type: Bulk *Type 27*Depressed center*Designed for metal grinding, metal abrasion, body work, metal fabrication and general repair work* Used on ferrous materials *Discovery Regional