Boaters, sailors, surf ski paddlers – listen up! This isn't your average shackle. It's a quick-release, double-gate locking hook made from top-shelf 316 Marine Grade Stainless Steel. That means it laughs at saltwater, spray, and sun – it's got maximum corrosion resistance for the harsh marine environment. The coolest part is the pull rope. There's a lanyard attached to the plunger pin. So if you need to release it in a hurry, maybe under load or from a bit of a distance, you just give that rope a sharp tug. The gates swing open, and whatever you've got attached is free. It's a genius design for safety and convenience. It comes in two handy sizes: a 60mm (about 2.36 inches) overall length and a 100mm (about 3.94 inches) version. The working load is seriously strong, rated between 660 to 1800 pounds depending on the size, so it's plenty tough for most jobs. The surface is nicely polished, so it looks great on your deck hardware. Imagine using this for towing a surf ski, as a quick-release for a foresail sheet on a sailboat, for securing kayaks, or on any piece of boating gear where you need a secure connection that can be dumped instantly. The package includes just the hook itself. Please note, colors might look a tad different on screen, and there could be a tiny size variation because these are measured by hand. But for a professional-grade, no-rust, quick-release solution for your marine adventures, this shackle is a solid pick.