The MicroJig BLADECLEAN CPR Disc Set lets you Clean, Polish, and Restore all sorts of tools, hardware, and parts quickly and efficiently. The unique heavy-duty mandrel features an oversized head that securely holds the Scotch bright pads, improving the CPR discs' performance and life. Attach a disc to the included mandrel, insert the mandrel into a compatible rotary tool, and set the speed to 8,000 to 10,000 RPM for the best disc life. The CPR discs can also be used in a hand drill if needed. Cleaning bits, Polishing hardware, and Restoring tools is easier and faster with MicroJig's CPR Disc Set.