Compact， lightweight and powerful. More power and double the run time of NiCad Drills. The 20-Volt Lithium-Ion Drill Driver delivers 350 In./Lb. of torque power. Its high-speed transmission delivers 2 speeds (0-350 RPM and 0-1300 RPM) to ensure power and speed. 20-Volt Lithium-Ion Impact Driver delivers an incredible 1062 In./Lb. of torque power. The high-power variable speed transmission delivers 0-2200 RPM and 0-3800 IPM (impacts per minute). Both tools have ergonomic handles with rubber inserts that provide comfort and control. Both include built-in LED work lights， on-board battery power indicators and electric brakes. 3/8" (10mm) Single Sleeve Keyless Chuck. 21+1 Torque/Clutch Settings. Combo Kit includes: (2) 20-Volt compact Lithium-ion 1.5Ah battery packs， compact charger， high-quality contractor's bag， and #2 Phillips power screwdriver bit.