The Milwaukee M18 3651-20 Brushless Impact Driver is a compact 3-speed tool with 1/4" hex chuck, delivering up to 1,700 in-lbs of peak torque at 3600 RPM. It operates with an 18V Lithium-Ion battery (not included) and features a brushless motor for efficiency. The set includes the impact driver, belt buckle, and manual. This versatile tool is designed for various applications, providing power and precision in a compact design.