Manufacturer: Innovative Product Name: Snappy Coil Carabiner Color: FLAG This is a hook for attaching cameras, underwater lights, knives, etc. to a BCD. When carrying, it can be connected compactly with the buckle, and when using, the coil expands and contracts when the buckle is removed, allowing you to use it while preventing it from falling or being lost underwater. This item has been used for several years, so please purchase it if you understand this.