The M18(TM) 5 in. random orbit sander delivers corded power with 12, 000 max OPM output. The 7, 000-12, 000 variable speed dial allows the user more control over the output of the tool to match the orbit speed for the application. The tool's powerful motor allows the user to remove more material per battery charge. The M18(TM) random orbit sander powered by REDLITHIUM(TM) battery technology delivers up to 35 minutes of run-time on a M18(TM) 3.0 Ah battery pack. | Milwaukee Tool M18 Random Orbit Sander