DCF 860 B: This 20-Volt MAX XR 3-Speed High Torque Impact Driver is engineered for the demands of the pro with a max torque of 2,500 in./lbs., making it our highest torque impact driver. Maximize productivity with up to 63% faster driving, a no-load speed of 0-3,800 RPM, 9 built-in LEDs and 3-speed mode select to power through tough jobs. Charger sold separately. DCB P320 : The 20-Volt MAX XR POWERSTACK 3.5 Ah battery delivers 50% more power and a longer lifespan. Engineered with pouch cell technology, our best performing 20-Volt MAX 3.5 Ah battery powers through tough jobs, day in and day out. XR POWERSTACK batteries are a part of our best performing line of 20-Volt MAX batteries and are compatible with 20-Volt MAX tools. Includes both DCF 860 B and DCB P320.