Cando band klip fastener, large 5-1/2″, 10 each form exercise band into a loop and secure loop by clamping the band klip over the two ends of the band, a few inches from each end. This device allows band to be formed into a loop without tying the band into a knot. Many exercises with resistive exercise band require users to form band into a loop in order to perform the exercise. Cando exercise band klip, large 5-1/2″, 10 each.