The Hitachi KC18DJL 18-Volt 3.0-Ah Cordless Brushless Lithium-Ion Hammer Drill and Impact Driver Combo Kit contains technology that manages these motors through use of a microprocessor, resulting in ultimate efficiency. Not only does this technology remove the hassle and downtime of having to replace brushes, but it also prevents the traditional wear on the trigger switch and the armature, creating an extremely durable hammer drill and impact driver that is essentially maintenance-free. Powered by 3.0-Ah Lithium-Ion slide-type batteries for fade free power and 3x the total battery life of traditional batteries, this drill and driver combo provides professional grade power with 1,420-pounds of turning torque, 3,200-BPM and up to 2,600-RPM for the WH18DBDL impact driver and just shy of 660-pounds of turning torque, 27,000-BPM and up to 1,800-RPM for the DV18DBL hammer drill. The DV18DBL hammer drill weighs only 4.8-pounds and features a 4-way electric speed toggle and 2-way speed switch that allows for (8) different speed and power calibrations, a ratcheting 1/2-Inch keyless all metal chuck, (22) stage keyless clutch that delivers (22) torque settings and a optical trigger switch. The WH18DBDL impact driver weighs only 3.7-pounds and features a 4-stage electronic speed switch, a 1/2-Inch hex chuck for quick and simple bit replacements, limited and continuous impact modes and a optical trigger switch. Both tools also feature a metal belt hook, digital control panel, LED light and battery indicator. A UC18YGSL charger, (2) batteries, side handle, double sided Phillips No.2 driver bit and carrying case are also included with this kit. The Hitachi KC18DJL 18-Volt 3.0-Ah Cordless Brushless Lithium-Ion Hammer Drill and Impact Driver Combo Kit comes with a lifetime tool warranty, 2-year battery warranty and a 1-year charger warranty. Hitachi continues the tradition of innovation and engineering with new features in addition to classic quality.