Secures containers to railcars in railroad applicationsFits all containers with ISO corner castings.Easy weld application.Universal-no rights or lefts.Faster loading and unloading times by eliminating need for a ground man to lockunlock manual locks.Costs less to install and maintain.U.S. Patent 4, 626, 155 of Ms Holland Co. USARugged design ideal for specialty services such as garbagewaste haul and dirtsandcoal haul.