Milwaukee 4-Pole Frameless Motor: Features a robust design combined with rare-earth magnets for longer life, best-in-class 500 in-lbs of torque and 0-400/0-1,800 RPM.Compact Design: Allows greater accessibility in tight work spaces.All-Metal Gear Case and Chuck: Provide maximum impact and shock durability. "Compact Hammer Drill/Driver in its class is more powerful than the competition. Built with a Milwaukee 4-Pole frameless motor, the M18 Compact 1/2"" Hammer Drill/Driver delivers 500 in-lbs of torque and up to 1,800 RPM. At only 7-3/4"" length, this drill driver allows you access to the tightest work spaces. An all-metal gear case and 1/2"" metal chuck provide maximum durability, even on the most challenging jobsites. REDLINK Intelligence provides advanced protection in abusive situations and manages the tool's temperature to provide maximum life."