The bosch gds144vli professional cordless impact driver is the first 144volt impact wrench with flexible battery system there is a unique choice between the quotpremiumquot longer battery runtime and quotcompactquot less weight for even more comfortable work batteries it has a high torque and high impact rate 3 200bpm for fast work progress when driving screws in metal up to m16 and wood very short design for perfect handling even in the tightest spaces and overhead unique