Impact driver delivers high performance output without kick back Compact design maximizes user control for access in tight spaces Variable speed allows for precision performance that's right for each job RPMs (with MATRIX Power Unit): 12V MAX* = 0-2300, 20V MAX* = 0-3100 and AC 4A = 0-2500 BPMs (with MATRIX Power Unit): 12V MAX* = 0-2750, 20V MAX* = 0-3500 and AC 4A = 0-4000 Max torque (with MATRIX Power Unit): 12V MAX* = 1150 in/lbs, 20V MAX* = 1300 in/lbs and AC 4A = 1250 in/lbs For use with BLACK+DECKER BDEDMT and BDCDMT112 Impact Driver delivers high performance output without kick back Compact Design maximizes user control for access in tight spaces Variable Speed allows for precision performance that's right for each job RPM (12v Max = 0-2300, 20v Max = 0-3100 and AC 4A = 0-2500)