5mm Shock Bungee Cord Hook Karabiner Cord Black x 50 These hooks are designed to be used on elastic cord The hook attaches to the cord without the need for untidy metal crimping. The Shockcord hook is pushed on to the elastic cord and is secured by use of a plastic sleeve. Small hooks anchor it firmly when tension is applied. made from all plastic components - avoids danger of rust and corrosion To assemble the product: 1. Thread the sleeve on to the Shock Cord 2. Push the shock cord inside the hook as far as it will go. 3. Pull the sleeve over the hook, thereby capturing the Shock Cord. When tension is applied to the assembly the hooks lock firmly into the cord.