Positioning Device for Jaw Vise

FIG. 1 is a front top perspective view of a positioning device for jaw vise showing my new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a left side elevational view thereof, FIG. 5 is a right side elevational view thereof, FIG. 6 is a top plan view thereof; FIG. 7 is a bottom view thereof; and, FIG. 8 is a front top view of the positioning device for jaw vise in accordance with my design, shown in an environment thereof. The features shown in broken lines depict environmental subject matter only, and form no part of the claimed design.