The TowSmart Coupler Anti-Theft Lock Kit includes necessary theft-deterring locking accessories that protect your boats, campers, trailers, and equipment from theft. The lock kit includes a high-visibility universal coupler lock, a brass coupler lock, and a boomerang bent hitch pin with a patented, reversible dual diameter design that fits 1/2 In. and 5/8 In. receiver holes and provides a tight and secure fit. Each coupler lock secures the trailer to the ball mount when in tow and provides superior protection when the trailer is left unattended. The hitch pin is made of corrosion-resistant materials designed to withstand extreme weather. Weather-resistant dust caps protect the locking mechanisms from moisture. This product is not recommended to remain on vehicles for an extended period of time.