CURT specialty locks are a line of unique towing locks that provide the security you need to keep that trailer and those toys safe from theft. It does not matter where the road takes you; if you are towing, you want the peace of mind to be able to enjoy yourself, and that peace of mind only comes with a CURT lock. One specialty lock offered by CURT is the kingpin lock. This key-operated lock is made specifically for 5th wheel trailers. It easily slips over a 5th wheel trailer's kingpin and ensures that the trailer cannot be towed away without your permission. With a universal design, it is able to fit most 5th wheel trailers on the market today. The CURT kingpin lock is made of strong aluminum and is key-operated. For all of your trailer security needs, look to CURT for the lock to keep that boat, RV, toy hauler -- whatever it may be! -- safe and sound.