Features Specifications:SHACKLE,STAINLESS STEEL SNAP SHACKLE,SWIVEL SHACKLE,SECURITY SHACKLE,cargo shackle,D-shackle,Bow Shackle  Also known as a chain shackle, D-shackles are narrow shackles shaped like a loop of chain, usually with a pin or threaded pin closure. D-shackles are very common and most other shackle types are a variation of the D-shackle. The small loop can take high loads primarily in line. Side and racking loads may twist or bend a D-shackle,Bow Shackle