Forney Metal Cut-Off Wheel 4-1/2 in. Dia. *Diameter: 4-1/2 in. *Arbor Size: 7/8 in. *Material: Aluminum Oxide *Product Type: Metal Cut-Off Wheel *Number in Package: 1 pc. *Arbor Type: Type 27 *Thickness: .045 in. *Maximum Speed: 13580 rpm *Packaging Type: Bulk *Compatibility: Right Angle Grinders *Usage: Designed for metal cutting-metal abrasion-body work-metal fabrication and general repair work *Type 27*Depressed center*Designed for metal cutting, metal abrasion, body work, metal fabrication and general repair work. Used on ferrous materials *Discovery Regional