Jul 11, 2021 · Cable ties with plastic pawls. This mechanism is used in 90% of all polyamide (PA) cable ties made by HellermannTyton. In order to cover a variety of applications, there are different variants of this system, for example: releasable versions, in-line versions, open head versions. These are one-piece cable ties. Here, the pawl, or tongue, is moulded as an integral part of the head.