Forney Masonry Grinding Wheel 4 in. Dia. x *Diameter: 4 in. *Thickness: 1/4 in. thick *Material: Silicon Carbide *Product Type: Masonry Grinding Wheel *Maximum Speed: 15200 rpm *Number in Package: 1 pc. *Arbor Size: 5/8 in. *Packaging Type: Bulk *Arbor Type: Type 27 *Compatibility: Righ Angle Grinders *Grit: C24S-BF *Type 27 * Depressed center* Fiberglass reinforced* Used primarily on ceramic, masonry, plastic and other non-ferrous materials* Quality made to provide fast, safe and dependable service *Discovery ACC