Owning a trailer is something to be proud of. Whether you’re parked at a race, at a job, or in your own driveway, it’s bound to get noticed but sometimes for the wrong reasons. Your rig is secure when you’re out and about with a receiver lock. But what’s stopping even a clumsy thief from pulling up to your house at night and hitching your parked trailer to his truck? That’s where a coupler lock comes in handy. The lock fits around the coupler, making it impossible to hitch it to anyone’s trailer.