Features: Spyder Bite ceramic abrasive flap discs provide fast stock removal and a smooth finish on mild steel, stainless steel, ferrous metal and cast iron. A 5/8-11 spin-on arbor is up to 2x faster to install than using a conventional 7/8-in angle grinder nut and makes it easy to remove without requiring separate removal tools. Premium ceramic abrasive flaps remove up to 6x more material than premium bonded abrasive grinding wheels. 36-grit abrasive provides fastest stock removal, 80-grit abrasive provides smoothest finish, 60-grit abrasive provides a blend of fast stock removal and smooth finishing. Up to 6x faster stock removal than premium bonded grinding wheels Up to 2x faster installation with 5/8-11 spin-on hub for quick, tool-free changes Proprietary ceramic abrasive grain self-sharpens during use for consistent performance Layered flap design flexes to conform to irregular work surfaces grinds fast under high pressure and polishes under low pressure Composite backing hub is easily trimmable and will not mark work surfaces Safer, low-profile hub sits within the tool guard, better protecting the user from sparks and debris Cooler-running ceramic abrasive resists leaving heat marks and is ideal for heat-sensitive materials like stainless steel Type 27 flat-face abrasive profile