Out on the trail today, hunting unusual wrenches, I came across this unusually configured 8-inch Bostitch adjustable. The handle has an unusually shaped hang hole, the handle has 3 notches on one side and 1 on the other side, and the jaw has instructions regarding which side to use when loosening or tightening. Jaw openings are indicated both in fractional inch sizes and mm sizes. One jaw face is pinned in.
This is a special purpose tool, I just don't know what it is. Does anyone know?