Usa: can adjust sag with tension. Features: it can be loosened or tightened in both positive and negative directions, and the wrench can rotate 360 °. It is used for tightening the ground wire or traction in power engineering and telecommunication engineering, and for pulling wires. High strength steel wire is used, which is not easy to be broken, and the hook head is with alloy steel. And the hook head part is oval with safety device, which is beautiful and has high strength. wish you a happy shopping. If you have any questions, please contact us in time and we will reply you within 24 hours. I wish you a happy shopping again! !