An arrangement of a carrier plate and vise stop which provide an abutment against which a workpiece rests laterally when being milled. The carrier plate affixes to a rear portion of a fixed jaw of a milling machine, the carrier plate having a forward recess for receiving the rear portion of the fixed jaw which nestles into the recess as the recess is dimensioned for receiving at least three sides of the fixed jaw. The carrier plate includes a plurality of locator chambers sized for receiving dowel pins of a vise stop, whereby adjacent locator chambers are spaced at a constant distance apart from one another. The interlocking of the dowels of the vise stop and the carrier plate may occur at varied lateral locations between the sides of the milling machine. A nose of the vise stop extends into the work area of the milling machine, providing the abutment.