1/2 in. keyless metal chuck. Heavy-duty high torque. Two speed gear box (0-400 rpm / 0-1700 rpm / 0-19200 bpm Impact). Variable speed trigger with forward/reverse switch. Built-in high output LED light illuminates work surface for increased visibility. Includes 6 drill bits, 6 screwdriver bits, and 1 bit extender. Includes 20V Lithium-Ion battery with LED battery level indicators. Intelligent charger prevents damage to battery.