Dry Diamond Cutting Disc 41⁄2"

Size: 4 1/2 inches (115 mm) diameter. Arbor Size: 22.23 mm (standard for most small angle grinders). Max Speed: 13,200 RPM (Rotations Per Minute). Type: Segmented Rim. The gaps (gullets) between the diamond segments help dissipate heat and remove debris during "dry" cutting.