5/16" Transport Binder Chain with Grab Hook matching 5/16"-3/8" Heavy Duty Chain Level Binder are commonly used in the trailer and storage industry to secure cargo to trailers. Our Level Chain Binder are designed for extreme durability and high security. together with chain binder for tie-down heavy duty application.All our load binders meet FMCSA and DOT specifications, and have size, break strength, and working load limit information on the handle.