With a head size of only 3.75", the M12™ Cordless LITHIUM-ION 3/8'' Right Angle Drill Driver delivers 100 in-lbs of torque in a compact light weight design. The first sub-compact right angle drill driver with a spindle lock chuck, the 2415-21 is the most versatile right angle drill/driver in the industry. Built in electronics include an electronic clutch, fuel gauge, variable speed control and overload protection.