This 4" x 37 US Cargo Control BlackLine heavy-duty winch strap has a break strength of 24,000 lbs., and a working load limit of 6,670 lbs., making it the strongest webbing available on the market. A 30" chain extension makes it easier to fully wrap the winch extension around your stake pocket. This not only provides a better, more secure hold but also gives you the full working load limit of the stake pocket. The chain is made from strong 3/8" Grade 70 Transport chain and is zinc-plated for extra corrosion resistance and durability, as well as easy identification as G70 chain. The 37-foot length strap fits standard 4" winches. Trailer winch straps are a common and versatile tool in the flatbed trucking industry and can be used to tie-down and secure a wide range of cargo. Our truck winch straps meet Web Sling and Tie Down Association (WSTDA) standards. The next time you need to use winch hook straps to tie down cargo on your flatbed trailer, make sure you are using high quality and reliable 4 Inch Winch Straps like the BlackLine 4" x 37 Winch Strap with 30" Chain Extension from US Cargo Control.