DBL SIDE FLAP DISC, 40/80G *Product Type: Double Sided Flap Disc *Diameter: 4-1/2 in. *Grit: 40 & 80 Grit *Maximum Speed: 13500 rpm *Easy and fast mounting with the 5/8 in.-11 spin-on center* Double-sided flap discs allow you to complete two process applications, such as grinding and finishing, using the same product