19mm(3/8")keyless chuck / 1 , 2 step Gear adjustment - 1 step gear - 0~ 400 rpm , 2step 1,300 rpm / Torque adjustment - Rigid material work - 36Nm, Ductile materials work - 16Nm / unit , 2.0Ah Battery 2EA , Charger , Manual (Korea) , case, bit