Powerful drill -- 850W pure copper motor generates more power and provides added durability as well as overload production for drilling in steel, concrete and other hard materials. 2 in 1 hammer drill -- Following your task, change the button on the top to choose drilling functions and hammer, drill and hammer drill models for wood, steel or masonry applications. Speed adjustable -- Speed setting knob and variable speed trigger allow you to control drilling speed at 0 ~ 3000 RPM; The lock button allows you to lock the speed without holding the trigger all the time to reduce fatigue. Lightweight and convenience -- Lightweight at 4.4lb for greater ease of use and maneuverability. Forward and backward setting brings the flexible operation. Rotating auxiliary handle & metal chuck -- This hammer drill comes with a rotating auxiliary handle, which adds the flexibility and offers the best grip. The metal chuck is more durable and sturdy, allowing you to change a variety of drill bits with ease. The maximum chuck diameter of this impact drill is 13mm., Weight: 4.4 pounds, Manufacturer: BRIEFNESS