This article needs additional citations for verification. The common cable tie, normally made of nylon, has a flexible tape section with teeth that engage with a pawl in the head to form a ratchet so that as the free end ดู history the tape section is pulled the cable tie tightens and does not come undone. Some ties include a tab that can be depressed to release the ratchet so that the tie can be loosened or removed, and possibly reused.
The most common cable tie consists of a flexible nylon tape with an integrated gear rack, and on one end a ratchet within a small open case. A cable tie tensioning device or tool may be used to apply a cable tie with a specific degree of tension. The tool may cut off the extra tail flush with the head in order to avoid a sharp edge which might otherwise cause injury. There are self-locking loops, based on the construction of the traditional cable tie, designed for surgery. The device is intended for ligation purposes and enabled a shortened duration of surgery. By compressing tissue hemorrhage is prevented. Traditional cable ties, due to their non-resorbable material, may not be left in the body permanently due to the risk of development of chronic granulomas.
Betts, an electrical company, in 1958 under the brand name Ty-Rap. Initially they were designed for airplane wire harnesses. The original design used a metal tooth, and these can still be obtained. The design has over the years been extended and developed into numerous spin-off products. One example was a self-locking loop developed as an alternative to purse-string suture in colon anastomosis.