Narrow loop design staggers the wedges vertically on the bar allowing the wire to be centered and attached quickly and easily. The narrow loop design also works well with 2×4 woven wire. Stretcher bars are available in 5 sizes; 53″ bar/5 wedges, 66″ bar/6 wedges, 80″ bar/7 wedges, 99″ bar/9 wedges, and 127″ bar/11 wedges. Replacement wedges also available.