The tightener is mainly used to tighten wires during the construction of overhead line laying, mainly divided into: multi-functional tightener, iron wire tightener, double hook tightener, and tiger head tightener. Tightener, curved tooth tightener, triangular tightener, and Japanese type wire clamp. When using the tightener, first loosen the steel wire rope or galvanized iron wire on the tightener and fix it on the cross arm. Use a wire clamp to clamp the wire, and then pull the special wrench. Due to the anti reversal effect of the pawl, the steel wire rope or galvanized iron wire is gradually wound around the ratchet drum to tighten the wire. Fix the tightened wire onto the insulator. Then, first release the pawl to release the steel wire rope or galvanized iron wire, then release the wire clamp, and finally wind the steel wire rope or galvanized iron wire around the drum of the ratchet. Tightener can improve the safety of cargo transportation and lifting process.

　　Multifunctional thread tightener: includes a thread clamping part and a thread tightening part, characterized by its thread tightening part. In addition to a ratchet wheel installed on the central shaft, it is also equipped with a tooth wheel and a reverse hook engaged with the tooth wheel. Tiger head. Tightener: used for tightening steel stranded iron wires in transmission and communication lines.

　　Model of tightener: JK-500C, JK-1000C, JK-2000C, JK-3000C

　　Model of multi-functional tightener: SJ-15, SJ-20, SJ-3