This impact driver features the Triple Hammer technology(TM) incorporating a third impacting anvil that increases driving speed, beats per minute, torque and decreases vibration. It provides an outstanding power with up to 4,100 RPM. It has a hex keyless chuck for quick and simple bit replacements. The responsive variable speed trigger provides complete control during the application. The ergonomic soft grip reduces fatigue for an extended use. The driver is lightweight (4.1 lb) and it is compatible with Multivolt batteries. Lifetime tool body warranty.