Has anyone purchased the new Craftsman box wrench set that has the box end turned 90°? I was looking at them, and the idea is to put less strain on your hand. Usually, though, when I'm having that much trouble loosening a nut, I'll get a mallet and give the other end a few whacks. With the end rotated 90°, I'd be hitting on the thin edge of the wrench... Any problems with it breaking that anyone knows about? Not that I wouldn't be able to return them, but I wouldn't want them to break in the first place.