Specification Brand : KIMISS BulletPoint1 : [Reliable B Type Design] Ensures objects are firmly fixed and safe for high-risk environments like ships. BulletPoint2 : [Working Load Limit 4-80kg] Not suitable for climbing activities, but for marine applications. BulletPoint3 : [Versatile Usage] Ideal for yacht diving, ropes, chains, straps, household, farm, and recreational use. BulletPoint4 : [Highly Stainless Steel] Made of marine grade 316 stainless steel, -resistant and in seawater environments. BulletPoint5 : [Secure Closure] Double ended design for easy attachment to d shaped rings with a spring bolt for secure closure. Color : Silver ItemName : Double Ended Bolt Snap Hooks, 4pcs Marine Grade 316 Stainless Steel for Ropes Chains Straps (100mm) ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 12 centimeters ItemPackageDimensions_Width : 10 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : slide-bolt-snaps Manufacturer : KIMISS Material : Brass Stainless steel MeasurementSystem : Inch ModelName : KIMISSem8yhwfbso-11 ModelNumber : KIMISSem8yhwfbso-11 NumberOfItems : 1 PartNumber : KIMISSem8yhwfbso-11 Pattern : Solid ProductDescription : 1. Stainless Steel: Made of marine grade 316 stainless steel, the double ended spring hook is resistant and highly , making it suitable for use in seawater environments. 2. Versatile 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. 3. Practical Design: The double ended design makes the bolt snap more versatile. The spring bolt provides secure closure and easy opening with a thumb lever. 4. Unique 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. 5. Detail 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.