A push button locking pliers has a plurality of macro jaw width stations for grasping a wide variety of objects. A positioning mechanism is connected to a movable jaw member having a pivot that cooperates with a jaw adjustment slot in the main handle. The positioning mechanism is released by pushing on a push button on the pivot against a spring allowing the movable jaw member to move along the slot. The user places the positioning mechanism at the jaw positioning station that creates a macro spacing between the fixed and movable jaws that best fits the object to be grasped. The push button is then released allowing the pivot to engage the rounded hole of the new positioning station. The pivot is made self centering on the rounded hole of the new positioning station by having a frustoconical section that engages the side of the hole even if the pivot is not centered on the hole. The bias of the spring forces the frustoconical section along the side of the hole which pushes the pivot to a central position in the rounded hole making the pliers ready for use.