Impact wrench: Brushless motor, Square drive: 1/2, No-load speed: 0-1600/0-1900/0-2300rpm, Impact rate: 0-2100/0-2500/0-2900bpm, Fastening torque: 400Nm, Nut-Busting torque: 550Nm. Included components: 1 impact wrench+ 1 brushless drill+ 2 2.0ah battery+ 1 charger+ 3 sockets+ 47x accessories+ 1 carrying case.