Boat owners and marine enthusiasts, these Extreme Max D shackles are seriously tough hardware for all your marine applications. Made from marine-grade 316 stainless steel, these shackles are built to handle the harshest saltwater environments without rusting or corroding. The 5/16 inch size is perfect for various marine uses, and with a working load limit of 1300 pounds, they can handle some serious weight. The long design gives you more room for connecting multiple items or working with thicker ropes and cables. What's really important to remember is that these are NOT for overhead lifting applications - they're designed for marine use where safety is critical. The corrosion resistance is excellent thanks to that 316 stainless steel construction, which is specifically formulated for marine environments. You get two shackles in the pack, which is perfect for having spares or for projects that require multiple connection points. The quality is evident in the smooth finish and precise threading - these aren't cheap imports that will fail when you need them most. Whether you're using them for rigging, securing equipment on your boat, or any marine application where you need reliable, corrosion-resistant hardware, these D shackles deliver professional-grade performance. They're also great for outdoor projects beyond boating - think camping, RVing, or any situation where you need durable, weather-resistant connectors. For the price, you're getting quality marine hardware that won't let you down when exposed to water, salt, and the elements. If you need reliable shackles that can handle marine conditions, these are definitely worth having in your toolbox or on your boat.