Designed for semi-trailers and fifth wheel campers, the Jendyk Standard King Pin Lock provides extra security and prevents hijackings. Made with thick-walled, high-strength ductile iron casting, this theft-deterrent device is virtually impossible to break. The open base allows water and ice to drain easily and the unique, bell-shaped design keeps the lock from jamming or wedging in the fifth wheel. This lock fits over a standard king pin and is keyed alike for master key applications.