The HART 20V Rotary Tool is the perfect tool for precision sanding . buffing . and cutting. The variable speed dial allows for ultimate rotary control from 5 .000 RPM to 34 .000 RPM. Featuring on-board bit storage on the face and underneath . the tool is ideal for organizing accessories in a new way that works for you! The handheld pen shaft is lightweight and easy to maneuver . giving you the perfect amount of dexterity and precision for creating even the most intricate designs. The spindle lock makes bit changes quick and easy. This rotary tool runs on the same HART 20V lithium-ion battery as all other HART 20V power tools . meaning that not only is this rotary tool easily portable . but it uses the same fade-free battery as all other 20V HART tools in your collection!