This drill and driver set contains the new lighter rotor motor, which is lighter and more powerful than the old one, giving the drill / driver the same power despite lighter weight and a more compact design. The drill is very powerful with its torque of 600 in-lb and speeds (0 to 1,900 rpm to focus on speed and 0 to 500 rpm to focus on torque). The robust mandrel provides better strength and better torque transfer. Since it is a keyless chuck with Auto-Lock type, it is possible to change the bit or bit easily with one hand. This cordless drill features the Bosch Compact Tough ™ design - weighs only 3.5 lbs and has the shortest head in its class (7.0 inches long). It is a tough and powerful drill that can be used for the hardest materials.Durable, heavy-duty chuck – better bit retention and great torque transferInnovative, lighter 18 V canned motor – more compact but the same powerCompact Tough design – shortest head-length in class for maneuverabilityTough motor – all-day productivity with 600 In.-Lbs. of torqueComfortable to use – weighs only 2.6 Lbs. and is only 7.5 In. longErgonomic grip zone – small diameter enables better gripping and greater comfortOutstanding control - variable drilling speeds for high speed (0-1,900 RPM) and high torque (0-500 RPM)Versatility for more productivity – keyless ratcheting 1/2 In. chuck enables one-handed bit changesElectronic Motor Protection system – longer life in tool, protects it from overload