There is disclosed herein an improved adjustable tool, such as a pair of pliers, having a first jaw portion and a second jaw portion, the first and second jaw portions being pivotably connected to one another by a pivot pin attached in any manner to one of the jaw portions and fitted within a channel defined within the other of the jaw portions. Preferably, the channel is formed by a plurality of pivot centers, including two non-adjacent terminal centers and at least one intermediate center, each center being connected to at least one other center by a slot to form a single pathway such that travel of the pivot pin between non-adjacent pivot centers requires travel through at least one intermediate pivot center, and the pivot pin has a positive tactile indication when properly seated in each pivot center.