FIG. 1 is a top, front, right-side perspective view of a binding showing my new design; FIG. 2 is a top, front, left-side perspective view thereof; FIG. 3 is a top, rear, right-side perspective view thereof; FIG. 4 is a top, rear, left-side perspective view thereof; FIG. 5 is a front view thereof; FIG. 6 is a rear view thereof; FIG. 7 is a left side elevational view thereof; FIG. 8 is a right side elevational view thereof; FIG. 9 is a top plan view thereof; and, FIG. 10 is a bottom plan view thereof.