Whether you select the retainer with U-clips or the one with NPS hooks, you will be pleased. Our retainers are of the finest quality. The 100 packs U clip are made from steel and then nickel-plated. Our round woven Nylon Cord with two "U" Clips are perfect for many applications. The two NPS round woven nylon cord measures 36" (914MM) in length and comes with two Nickel Plated Steel Hooks (one at each end), perfect for many applications. It, too, is available in quantities of 100.