For all of your heavy duty work. Submarines, aircraft, amphibious UTVs, space craft, bulldozers, watercraft, tractors, and automotive. There are few motorized vehicles that don't have a mechanic somewhere reaching for this wrench. Our 3/8 in PRO is designed to be used with your own sockets and ratchets. It has the versatility to work from either side. This is our most versatile wrench because of it's ability to work with 3/8 in sockets and if you drop in our 3/8 in to 1/2 in adapter the it will work with 1/2 in drive sockets as well. And the 1/4 in bit adapter, allows you to tighten screws in difficult places. Attach your drill or impact gun to get the job done even quicker.