4-1/2" METAL DC GRIND DISC TYPE 27 4-1/2X1 *Diameter: 4-1/2 in. *Material: Aluminum Oxide *Thickness: 1/4 in. *Number in Package: 1 pc. *Product Type: Metal Grinding Disc *Arbor Size: 7/8 in. *Design: Type 27 *Maximum Speed: 13280 rpm *Compatibility: Angle Grinders *Packaging Type: Bulk *Usage: Metal *Depressed center