The SNAP’n SAFE breakaway post couplers are approved by the FAA as a 'frangible connection' as stated in the Advisory Circular 150/5220-23. The frangibility connection performance has been tested and approved by the FHWA. The couplers provide a valuable and economical solution for posts or poles needing frangible support structures. Ground mount SNAP'n SAFE units work expecially well in perimeter fencing applications. Surface Mount SNAP'n SAFE units provide a frangible connection when mounting directly to concrete. For more information visit www.designovations.com.