Fein 18V Li-Ion Drill Driver & Impact Driver Fastening Kit 18V Cordless Lithium-Ion 2-Speed Compact Hammer Drill Driver. Fein's reliable 4-pole DC motor with overload protection 2-speed solid metal gearbox 486 in-lbs. of torque (55 Nm) with 0 - 9350 / 0 - 29,000 BPM selectable hammer drilling action 400 screw connections on a single, fully charged battery (2.0 Ah)