stainless steel shackles material: stainless steel 304,Superior strength & rust resistance ,Strong and durable. 1/4" shackle max open width: 1/2" Working Load Limit: 200kg Have a oversized screw pin,the pin is 8mm Bow shackle made of stainless steel 304,corrosion resistant - won't rust ,solid and sturdy,can be used for a life time. Stainless shackle 1/4"(6mm) have oversized screw pin,the pin Dia is 8mm Stainless steel shackles heavy duty, can be used for coupling chain and wire rope for camping, hiking and other outdoor sports. Shackles max open width: 12mm, Working Load Limit: 650lbs Package: 4pcs 1/4"(6mm) sailing rigging shackles