The Peggy Flashmer Clip-On Rolling Swivel features a spiral attachment that holds the loop or ring of the leader. The swivel has a pigtail design, with no small latch to open. The rolling mechanism rotates with the rig, and the entire unit has a black nickel finish. Sizes #20, #16, #12, #8, and #4 have breaking strengths of 12, 18, 30, 35, and 43 kg, respectively. These swivels are used for surfcasting, as support swivels, with lures, or for carp fishing, and are sold in packs of six.