These chain assemblies are designed specifically for attachment to wire rope winch lines. Known as "Tail Chains", they feature a permanently welded-into-place choker hook at the live end of the chain. The hook is sized to fit securely over a properly-sized winch line (see specifications below). Made from high-quality steel--Spectrum 4 for sizes 5/16" - 5/8" and Spectrum 8 sizes 3/4" and up. Be sure to choose the right size to match up to your wire rope diameter.