Cordless Drill Driver GSR 12V-15. The GSR 12V-15 Professional cordless drill driver offers a balanced combination of power and size in Bosch's 12-volt class. Its strong torque of 30 Nm and 0-1,300 rpm provide the best ratio of size to performance. Its compact design allows for optimal handling, making it ideal for overhead work and tight spaces. Overload, overheating, and deep discharge are prevented by the drill driver’s Electronic Cell Protection. This power tool is designed for drilling in wood with a maximum diameter of 19 mm, in steel up to 10 mm, and for screw diameters up to 7 mm. The device is compatible with all Bosch Professional 12-volt batteries and chargers. The GSR 12V-15 Professional also features 2 gears, auto-lock, battery charge indicator, Electronic Motor Protection, and lithium-ion technology.