High durability in mechanical parts, motor and carbon brush. 2 operation modes - hammering with rotation and rotation only. Speed and torque in reverse are the same as forward rotation by using brush holder unit. One-touch sliding chuck enables easy bit change. Ergonomically designed rubberized grip provides more control and comfort. Easy-to-operate large trigger switch and lock-on button. Double Insulation, Variable Speed, Reversing, SDS Plus, Torque Limiter and Carry Case. Tool sold without bit. Requires SDS adapter to drill into steel or wood