5k Double Hook Trailer Safety Chain with dual securing hooks for mounting to the tongue of your boat trailer or utility trailer. Trailers are required to have these for added safety while towing. This safety chain incorporates both chains into one single length with two hooks. It can not be stressed enough how important it is to have safety chains on your trailer. Having properly functioning safety chains will prevent a bad situation from turning into a disastrous situation. This listing is for a 5k Double Hook Trailer Safety Chain 60 inch long, 1/4″ link diameter, Grade 30 Safety Chain with dual hooks. This chain has a 5,000 lb Breaking force.