A cable tie or tie-wrap, also known as a hose tie, zap-strap, or zip tie is a type of fastener, for holding items together, primarily electric cables or wires. Because of their low cost and ease of use, tie-wraps are ubiquitous, finding use in a wide range of other applications.
A cable tie consists of a sturdy nylon tape with an integrated gear rack, and on one end a ratchet within a small open case. Once the pointed tip of the cable tie has been pulled through the case and past the ratchet, it is prevented from being pulled back; the resulting loop may only be pulled tighter. This allows several cables to be bound together into a cable tree.