Red Hound Auto 10pc 5/16" Carbine Snap Spring Loaded Hook 8 x 80mm M8 Includes 10 stainless steel snap spring hooks. High quality stainless steel, Highly rust resistant. Size: 8mm thick by 80mm long (about 5/16" thick by 3-1/8" long). Working Load Limit (W.L.L.) is 500 pounds. Stainless steel snap hook.