This heavy-duty steel king pin lock prevents theft of trailers by covering the entire king pin and prohibiting its engagement with the fifth wheel. This 5th wheel slide bolt lock includes 2 keys and measures 3.25 inches high 3.5 inches around. The bright yellow warning tag hangs from a 12-inch chain to deter thieves before they even get started. Fifth wheel hitch locks (pin locks) are among the many truck accessories that offer various benefits including enhanced security and durable protection. The RoadPro steel cylinder hitch lock comes with a simple locking system and is super easy to operate yet gets the job done. You can enjoy peace of mind while youre on the road knowing would-be thieves will be deterred from stealing or disconnecting your trailer or RV. The steel lock cannot be removed without the authorized keys. In addition to being highly secure this steel 5th wheel lock is also versatile and can be used on a wide range of RVs and trailers. Its a trucking accessory that can potentially save you thousands of dollars in the event of theft or damage to your trailer. With this lock in place you can rest easy knowing that your trailer is safe and secure even when youre not around to keep an eye on it.