Hook wrench: also known as the crescent wrench, commonly known as hook wrench for twisting the thickness of the restricted flat nuts; dedicated to the dismantling vehicles, machinery and equipment of the round nut, the slot is divided into rectangular and circular card slot The groove I plant products by the National Hardware products department for supervision and detection random sampling timing of granting North alloy casting product development committee in 2004 was honorary award; the same year was awarded the China Light Product Quality Assurance Center as "the quality and credibility of dual-protection model units "bronze medal and certificate. I would like to plant with a sincere heart and our friends mutual co mutual assistance, and seek common development, create brilliant. Details http://www.hbbtglj.com/tzbs/