Hitachi WR18DL 18-volt Lithium-Ion Cordless Impact Wrench  (Discontinued by Manufacturer) Cool Flow system allows the impact to run harder and longer, minimizing the risk of burnout Industrial grade, two-piece motor with heavy gauge copper coils for added power and durability 1,950-inches per pound of driving torque to power through the toughest jobs Unique 2-step speed switch provides (2) speed settings for ultimate control Comes with Hitachi's lifetime Lithium-Ion tool warranty Two 3.0 Ah HXP Lithium Ion batteries for threetimes the life at half the weight of NiCd or NiMH batteries Lithium Ion batteries can be used-Inch Hitachi 18-volts DMR and DVF3 tools for even more value Class leading torque- 1,950-Inch/lbs to power through the toughest jobs with ease; 1/2-Inch square drive Hitachi-foots 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-Inch lengthand 3.5-pounds for maneuverability