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'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.