The pin-fulcrumed inner jaw is pressed by a spring. Wrenches,
pivoted outer jaw, the outer jaw (the one at the end of the handle or the one farthest from the hand) is pivoted or swings as on a pivot. Wrenches, Pivoted outer jaw, fixed-fulcrum. The fulcrum on which the jaw swings does not travel relatively to either the fixed jaw or the parts which it connects.