US Patent 9890831 Shackle safety pin

The methods, systems, and the safety shackle apparatus of this invention provide safety, convenience, and reliability needed for shackle applications providing flexible use (fits multiple size shackles and multiple brands of shackles), stores in shackle pin when not in use, saves time vs traditional moussing techniques, difficult to be installed incorrectly, no tools required, no loose parts or pieces, prevents injury from pokes of sharp wire when moussing, prevents sling damage and chaffing from moussing wire ends, no single use consumables like rope, wire or zip ties (reusable), turns anchor and screw pin shackles into safety shackles, using the device doesn't change rigging practices or techniques, works with old or new shackles, works with bow shackle, anchor shackle, chain shackle, twist shackle, head board shackle, C-D-U shaped shackles, can be used in zero visibility, saves attachment and detachment time over a traditional method, system, or apparatus.