CURT 48-Inch Trailer Safety Chain with 17/32-In S-Hooks, 7,000 lbs Break Strength Model 80301CURT 48 Inch Trailer Safety Chain with 17 32 In S Hooks, 7,000 lbs Break Strength Model 80301 No matter how far you are planning to drive down the street or across the state using safety chains when you tow is smart, safe and required by law. Without safety chains attached, there is a serious risk of danger if your trailer becomes uncoupled from your trailer hitch. Play it safe with safety chains, and play it even safer with safety chains from CURT.