Hitachi WH18DL 18-volt Lithium-Ion Cordless Impact Driver (Discontinued by manufacturer) Cool flow system allows the impact driver 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 1,330-inches per pound of driving torque to power through the toughest jobs Unique (2) step speed switch (power mode/save mode) 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-volt DMR and DVF3 tools for even more value Class leading torque- 1,330-inch-pounds to power through the toughest jobs with ease; 1/4-inch hex drive Hitachi-foots unique Cool Flow system allows the impact to run harder and longer, minimizing the risk of burnout Compact and lightweight at only 6-3/8-inches longand 3.5-pounds