IIT 24 Grit 3" Sanding Discs & 1/4" Shank Fits Roloc Style (25-Pc) Includes 25 Roloc / Rolok Style 24 Grit Sanding Discs Threaded backs screw securely to the quick disc changes Quickly sand, grind, level and strip surfaces 3" Roloc / Rolok Style Holder For Sanding Discs Easy to use with 1/4" Shank