IT'S A LIFE SAVER.
Made with 5/32 in. 316 stainless steel 1x19 wire. Each has a toggle swage on the bow end and an eye swage on the aft.
Just unthread eye and slide the wire through your stanchions. Rethread the eye back on with red Thread Lock.
Note: The aft end is secured to your pulpits with 1/8 in spectra (sold separately).