The Grainger 16V994 is a Milwaukee M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 1/2 in. Hammer Drill/Driver Kit with One 5.0 Ah Battery. It has a brushless motor that provides increased efficiency, runtime and durability. The REDLINK PLUS intelligence system delivers an advanced digital overload protection for tool and battery and optimizes performance. It has a 1/2 in. all metal ratcheting chuck for superior bit grip and an integrated LED light to illuminate the work area. This kit includes an M18 5.0 Ah lithium ion XC battery for more work per charge and an M18 and M12 charger.