Key benefits Fast attachment and removal: the fixed spring mechanism lets you connect and release quickly, saving time and effort when working with rotary shackles and high-performance shackles. Corrosion-resistant and durable: stainless steel construction resists rust and marine corrosion for long service life with anchor chains, D-ring shackles, and other deck hardware. Secure hold: designed to minimize accidental separation and keep connections stable during use, improving safety for boat parts and rigging. Portable and easy to handle: lightweight, compact design makes the shackle simple to carry, store, and operate on the move. Features Fixed spring mechanism for reliable, repeatable engagement and quick operation. Stainless steel material provides rust-proof protection in marine environments. Compatible with rotary shackles, high-performance shackles, anchor chain links, and D-ring shackles. Raised security design reduces the chance of unintended release during normal use. Typical applications Boat rigging: connect blocks, lines, and hardware where fast, secure attachment and corrosion resistance are required. Anchor systems: link anchor chain to bow fittings or D-ring shackles while minimizing the risk of separation. General marine and deck use: fast, durable connections for mooring, towing, or temporary fittings on sailboats and motorboats. What you get A compact, stainless steel shackle with a fixed spring mechanism that combines quick operation, marine-grade corrosion resistance, and secure attachment for common shackle and chain connections.