Seachoice D Anchor Shackle. 316 stainless steel for rust resistance. State Size. Size (in.): 3/16; Working Load (lbs.): 700; Breaking Strength (lbs.): 2,800. Size (in.): 1/4; Working Load (lbs.): 900; Breaking Strength (lbs.): 3,900. Size (in.): 5/16; Working Load (lbs.): 1,900; Breaking Strength (lbs.): 7,700. Size (in.): 3/8; Working Load (lbs.): 2,900; Breaking Strength (lbs.): 11,900. Size (in.): …