I wanted to make my cargo trailer 'theft proof' so I bought two of these links to make a pair of quick release security chains that can be removed from the trailer (and stored in my garage). Sometimes thieves use trailer security chains to tow a trailer even when the hitch is locked. I wanted to make sure that this option wasn't available to the local criminal elements. They worked like magic and now my trailer is much more secure than when it was just parked next to my house with a lock.