Installation Method ①Add grease to the inside of the gasket and grind off the angle of the pin a little. ② Put pin in a drill and bevel off the end of one side against a file or against some rough cement. ③ When installing on truck, put spacer in as well as insert pin in as far as it will go. ④ Use a hammer or C-clamp to drive the pin to the locking ring. ⑤If you have any installation problems, please contact us in time. 【Fitment】1/2 inch hammerlock connector can be used as safety chain kit for super duty truck such as Chevy Ford GMC. 【Material】Made of heavy-duty G80 alloy. Each link provides a load capacity of 12,000 pounds.