This is galvanized 14 gauge wire used to secure the pin on a shackle. Failure to secure the pin will result in an insecure mooring causing unexpected vessel drift and or buoy loss. It has happened many times. Even when the pin is securely and tightly fastened, the load on the shackle will cause the pin to self-unscrew. Tie-wraps, nylon zip-ties are no substitute for this inexpensive wire.Safety wire is mandatory on all Screw Pin Shackles on all SOS moorings – NO EXCEPTIONS! Each shackle will need about 6-8 inches. Each coil is 15 meters and may be in either of the forms pictured.Discount coupons not permitted for buoy items. Prices will be corrected on order submission as appropriate in relation to the price structure.