Twist-Lock Backing Pad 2 and 3 quick replacement heavy duty durable spare rubber pad Heavy duty rubber pad, aluminum core with nickel plated removable steel shank Suitable for power drilling, mold/air grinding machines and other rotating tools 3 sizes, for a wide range of uses, can be quickly replaced, saving working hours An effective tool for grinding, polishing, surface treatment, paint removal, sanding primers, etc. The tool can also be used as a polishing disc holder to polish jewelry or cars