Two 3.0 Ah HXP Lithium Ion batteries for three??times the life at half the weight of NiCd or NiMH batteries Lithium Ion batteries can be used in Hitachi 18V DMR and DVF3 tools for even more value Class leading torque- 1,950 in/lbs to power through the toughest jobs with ease; 1/2-inch square drive Hitachi's unique Cool Flow system provides a steady stream of air to the motor, allowing the impact to run harder and longer, minimizing the risk of burnout Compact and lightweight at only 6-5/8 inches in length??and 3.5 lbs for maneuverability, Manufacturer: Hitachi