The Bosch HDS183-01 18V EC Brushless Compact Tough™ 1/2 In. Hammer Drill/Driver features KickBack Control, which reduces the risk of sudden tool reactions in binding conditions. This integrated acceleration sensor automatically shuts the tool down when a potentially dangerous rotational torque reaction occurs in a bind-up scenario. The drill was engineered with an upgraded, heavy-duty all-metal chuck that furnishes increased robustness and high torque transfer. With an efficient EC Brushless motor, this drill/driver provides longer tool life as well as great runtime. One of Bosch's Compact Tough™ designs, it has a short head-length and light weight but plenty of muscle. It delivers a powerful performance, with 531 In.-Lbs. of torque, two drilling speeds (0-1,900 rpm for high speed and 0-600 rpm for high torque), an impact rate of 28,500 bpm for masonry applications and 20 1 precision clutch settings for reduced fastener damage. This tool provides an ergonomic grip zone and Bosch's Electronic Motor Protection and Electronic Cell Protection, to protect the tool and batteries from overload and overheating. The kit includes two 18V 4.0 Ah FatPack batteries and a charger, to deliver all-day power, and a long belt clip for a secure hold.