Brand Name: Forney *Diameter: 3 in. *Arbor Size: 1/4 in. *Material: Aluminum Oxide *Product Type: Flap Wheel *Grit: 80 Grit *Number in Package: 1 pc. *Grade: Fine *Shank Diameter: 1/4 in. *Maximum Speed: 20000 rpm *3" x 1" x 1/4".  Features durable high grade aluminum oxide coating for aggressive cleaning and refinishing on most wood or metal surfaces. Can be mounted on electric drill and other machines with chuck.  Rated for use to 20000 RPM. *Discovery Regional