Crimp beads, also called crimp tubes, are designed to clamp down and secure Accu-Flex® beading wire. Crimp beads shouldn't be used when working with thread since they can cut or fray the thread over time.
Crimp beads provide a means for securing the ends of the beading wire after it has passed through the loop of the clasp or other finding being used in your design. Crimp beads are appropriate for any project: earrings, bracelet, necklace or other designs made using Accu-Flex.
Crimp beads come in a variety of sizes and should be bought in regard to the size beading wire you are using: