a jaw plate for a vise including a selectively extendable pin for locating a workpiece . an exemplary jaw plate may be installed in a workholding device , such as a vise , which may be used to hold a workpiece proximate a machine tool . an exemplary jaw plate includes a plurality of pins at predetermined locations along the jaw plate &# 39 ; s front face . the pins may be individually selectively extended or retracted by an operator . in their extended positions , the pins may assist the operator in locating the workpiece relative to the machine tool in a correct and repeatable position .