This 20V MAX* cordless kit includes a 5" Random Orbit Polisher, two 20V MAX* 5.0Ah batteries, charger, and kit bag. The high-efficiency brushless motor delivers up to 75% more runtime over brushed. The variable-speed trigger and dial allow for better control during car, headlight, windshield, and glass polishing applications. The 2.1" orbit diameter combined with the included 5" backing plate is recommended for most applications.