We designed this wrench to last. Tested by heavy equipment mechanics and farmers over the past 2 years the 1/2" drive exceeded our expectations. Rated on an impact for up to 1,200ft/lbs and 225ft/lbs of direct torque because of it's die cast aluminum frame, #40 chain, and roller bearings instead of bushings. This wrench comes with 14" of reach instead of 10" increasing your chance of extending far enough out to put on an impact wrench. The 1/2" even comes with a 3/8" adapter so you can easily switch between 1/2" and 3/8" sockets.