I made these up to connect my tree straps to the hammock. One end will go in the hammock body and be whipped over. Double layer 1" nylon with a hollow polypro braid anti-friction sheath. Anyone ever snapped an aluminum 'biner? They are 10" long, so I am not too worried about nylon stretch, just wondering about the biners. I have some U.K. made 1500# locking biners, but they seem like overkill.