I'm moving my tools to a new (to me) tool box and found these in at the back of my old box. They are some kind of speed wrench that allows you to rotate the open end without lifting it from the bolt or nut.
In SAE I have 3/8, 716, 1/2, 9/16, 5/8, 11/16, 3/4. That may or may not be a...