Compact and lightweight this battery powered electric impact driver delivers up to 1375 in-lb of max torque. Features a powerful 20 V motor and quick release 1/4 in hex chuck.High performance transmission delivers 1375 in-lb of max torqueQuick release 1/4 in hex chuckCompact and lightweight for ease of useMaximum initial battery voltage (measured without a workload) is 20 V nominal 18 VDetermined by 30 sec impact load gauge test method