These loop and end clamps (or hog rings) are made from durable 302 stainless steel. All looping rings are applied with clamp pliers. Use the hog rings for splicing elastic cord, upholstery, and general fastening purposes. Pair the loop and end clamps with C.S. Osborne hog ring pliers. Loop/End Clamp X-0 accommodates 1/4" cord and is available here in a pack of 620.