The bosch psb 1000 2 rce 1000 w hammer drill is suitable for even the most demanding applications with perfect power variation functions in a robust comfortable design the 2 speed gearbox allows for further versatility providing extreme torque in 1st gear and fantastic speed in the 2nd gear the speed and power controls are easily accessible even while working making it ideal for working on multiple materials with right left run a quick release drill chuck and an auto lock chuck for tool