It's Snap-on hands down. The "flank-drive" or whatever it's called was introduced back in the early 70's oj both their wrenches and their sockets. I still own the very first set of Snap-on combination wrenches I bought. They fit your hand well and it's the first wrench I reach for in the box. I also own Craftsman but they just don't feel or fit the same. Either brand has the lifetime warranty but I have never broken a Snap-on and I have broken a Craftsman.
