Brand Name: Gator *Size: 4.5 in. *Material: Aluminum Oxide *Attachment Style: Center Mount *Grade: Coarse *Product Type: Fiber Disc *Number in Package: 3 pk *Grit: 50 Grit *Usage: Multisurface *Number of Holes: 0 *Sandpaper Type: Resin Fiber Disc *Sandpaper Material: Resin Fiber *Abrasive Material: Aluminum Oxide *Should be used with a 4.5? backer pad with a 5/8? arbor