Abstract: A quick-change jaw system for use on a clamping mechanism, the clamping mechanism having a first pair of jaw members, each of the first pair of jaw members having a first longitudinal face, a second longitudinal face, and a jaw body, includes a second pair of jaw members, each of the second pair of jaw members having a jaw body, a first face being machinable for compressively engaging a work piece and an opposed second face, the second face having at least a first protrusion, the protrusion being engageable with a portion of a respective first jaw member. A locking pin member is actuable for lockingly engaging the protrusion with the respective first jaw member. Additionally, a method for repeatably clamping a work piece for effecting desired working operations on the work piece is included.