THREADED LATCH. This safety chain hook is equipped with a threaded end and hex nut to provide enhanced security when connecting your safety chains to your trailer hitch RELIABLE STRENGTH. With high-strength steel construction, this threaded hook is rated for a breaking strength of 8,800 pounds and a work load limit of 1,760 pounds READY TO TOW. Threaded trailer safety chain hooks are easy to install. Simply unthread the hex nut and link the hook onto the trailer hitch loop before towing. Then, tighten the nut using a wrench VERSATILE. Safety chain hooks are great for a wide variety of uses, beyond towing. This 5/16-inch diameter snap hook can be used to attach cargo straps or ropes or as a hand winch attachment hook for a quick connection CORROSION-RESISTANT. To promote long-lasting use and dependable safety, this threaded carabiner safety chain hook is finished with a durable zinc plating. It resists rain, dirt, snow, mud and other corrosive elements