Item Type: Double Ended Bolt Snap HooksMaterial: 316 Stainless Steel 1Stainless Steel: Made of marine grade 316 stainless steel, the double ended spring hook is rust resistant and highly durable, making it suitable for use in seawater environments. 2Versatile Usage: Designed for yacht diving, the hook can be used with ropes, chains, straps, and other household, farm, and recreational applications. It can be clipped onto any standard D shaped ring. 3Practical Design: The double ended design makes the bolt snap more versatile. The spring bolt provides secure closure and easy opening with a thumb lever. 4Unique B Shape: The B type design ensures that the object is firmly fixed and not easy to fall off. This design is safer and more reliable, and is suitable for use in high risk environments such as ships. 5Detail Reminder: The working load limit is 4?80kg, and please do not overload. Note that this hook is not suitable for mountaineering, rock climbing, ice climbing, and high altitude games.4 xDoubleEnded SnapHooks