Cordless Hammer Drill GSB 18V-90 C. The GSB 18V-90 C Professional is a powerful cordless hammer drill featuring a brushless motor that delivers a peak performance of 64 Nm and 2,100 min-¹. Its compact head size of 175 mm ensures perfect handling. The robust 13 mm metal chuck guarantees excellent torque transfer for any task. The hammer drill allows for outstanding tool control for increased user and tool protection: the HMI offers an adjustable KickBack-Control function that reduces the risk of kickback during tool lock-ups and sudden tool rotation. The adjustable precision clutch function prevents over-torquing once the preset torque is reached, thereby reducing clutch wear and noise generation. This tool is designed for drilling in wood with a maximum diameter of 68 mm, as well as in steel and masonry up to 13 mm in diameter each. The GSB 18V-90 C Professional is compatible with all Bosch Professional 18V batteries and chargers.