Features： 1、Stainless Steel: Made of 316 stainless steel, this shackle is rust resistant with excellent polish, brightness, and smoothness. It can withstand harsh marine environments and offers maximum resistance and durability in saltwater. 2、Versatile Usage: Suitable for various environments, this shackle can be used in boats, household applications, camping, hiking, and other outdoor sports. It is also ideal for loading and unloading goods, mining equipment, forestry machinery, hoisting machinery, and more. 3、Secure Closure: The pin threads into the shackle for a tight and secure closure, offers an exceptional load bearing capacity, highly strong, it's ideal for heavy duty applications. 4、Marine Application: D shaped shackle is commonly used with an expansion hook and stainless steel chain for boats, sailboats, trucks, RVs, trailer boats, and general marine applications. It is also suitable for coupling chain and wire rope. 5、Size Details: This shackle has a diameter of 5/16 inch(8mm) and a pin diameter of 5/16 inch(8mm). The opening size of the D shaped shackle is 0.78 inch(20mm), providing a secure and reliable connection for various applications. Specification： Item Type: Long D Shackle Material: 316 Stainless Steel, highly polishing Package List： 2 x Long D Shackle