The BLACK+DECKER BDCI20C 20v MAX Lithium Impact Driver features a high performance transmission that delivers 1375 in-lbs of max torque (determined by 30 second impact load gauge test method). This driver has a quick release 1/4" hex chuck. This unit offers variable speed, operates at 0-3000 rpm, and 0-39000 BPM. The BDCI20C Impact Driver is compact & lightweight for ease of use for all types of jobs. Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18. Includes: (1) BDCI202 Impact Driver, (1) 20v Max Battery, (1) Charger, (1) Screwdriving bit.