The DeWalt 20V MAX Brushless High Torque Impact Wrenches are available in three options - 1/2" (No. DCF899) hog ring or detent pin anvils, 3/4" (No. DCF897) hog ring with retention pin hole anvil and 7/16" (No. DCF898) quick release chuck. These impact wrenches use brushless motors and 5Ah 20V MAX XR Li-ion battery packs. The 1/2" version delivers 700 ft/lbs of max torque and 1,200 ft/lbs of max breakaway torque. The 8.9" long and 7 lbs impacts have three speeds, access tight spaces and utilize LED worklights.