Entry-door trailer locks have a full-sized handle for easy grip in all weather conditions. These locks act as a deadbolt system, locking out intruders while keeping contents of the towing vehicle safe. These locks have an interior safety release for emergency exits. Trailer coupler locks are made to ensure trailers are securely hitched and safe from theft. These coupler pin locks are used instead of standard hitch pains to help prevent trailer theft or unauthorized detachment from the tow vehicle. Gooseneck trailer locks securely latch the hitch ball to the coupler to prevent theft or detachment.