The Double "C" Clasp is a simple, yet well-fitted fastener. The unique "C" design has as split for easy hooking, but they also cup together so jewelry will stay in place. Composed of non-ferrous (mixture of non-magnetic) metals, each hook measures 1 inches (25.4 mm) from end-to-end. This fastener may require the use of an instant-bond glue, so we recommend assembly to be preformed by an adult only. One strand of Bunjee brand bungee craft cord (or any cord 3mm-4mm in thickness) can squeeze into the base. Illustrated assembly instructions are included under the header card.