The Milwaukee 2738-20 is a bare tool full-size cordless rotary polisher from the M18 FUEL line. Milwaukee 2738-20 M18 FUEL 18V Lithium-Ion Cordless 7″ Variable Speed Polisher (Tool-Only). System Compatibility: Compatible with Milwaukee M18 Redlithium batteries and accessories; designed for polishing, detailing, finishing work on vehicles or large surfaces where corded rotary polishers were traditionally used.