Makita XT261M 2 Piece 18V Lithium-Ion 4.0 Ah Cordless Combo Kit Variable 2-speed 1/2" Hammer Driver-Drill (0-600 & 0-1,900 RPM/0-900 & 0-28,500 IPM) with Makita-built 4-pole motor delivers 480 in. lbs. of Max Torque; weighs only 3.9 lbs. with battery Variable speed Impact Driver (0-2,900 RPM & 0-3,500 IPM) provides 1,460 . of Max Torque; weighs only 3.3 lbs. with battery Hammer Driver-Drill and Impact Driver both feature Extreme Protection Technology (XPT) which is engineered to provide increased dust and water resistance in harsh job site conditions Equipped with Star Protection Computer Controls to protect against overloading, over-discharging and over-heating 18V LXT Lithium-Ion 4.0Ah battery BL1840B features an integrated L.E.D. battery charge level indicator