The Bosch GSR 18V-21 is a cordless drill that will not let you down on intensive and frequent use. The metal gears and sturdy housing makes the 18 volt drill machine resistant to the conditions you have to deal with on a construction site. Loosening or tightening a series of screws is done with a maximum torque of no less than 55 Nm. And in 2nd gear the GSR 18V-21 makes 1800 revolutions per minute. Enough for drilling holes of 35 millimeters in wood. With the 2 supplied batteries and L-Boxx to store the cordless drill, this is a version that you as a professional do not regret.