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A Locking Safety Tether Hook That Can Rotate Off a U-Bolt?

Mar 26, 2011
2,910
Corsair F-24 MK I Deale, MD
This only took about 25 pounds (measured) of pressure and came as quite a surprise.

In this video, we see what could happen if the clip came across an obstruction, like a cleat:

The full story is here:
http://sail-delmarva.blogspot.com/2018/02/a-locking-carabiner-that-isnt.html
and here:
https://www.practical-sailor.com/blog/Safety-Tether-Clip-in-Caution-12376-1.html
https://www.practical-sailor.com/blog/Safety-Tether-Clip-in-Caution-12376-1.html
I've been using Kong Tangos for nearly a decade, and twist lock carabiners before that. I never trusted the Gibb Hook mechanism, the thin metal was obviously a hazard to rope, and weak as well. Fortunately, sailors very, very seldom test their tethers, so this sort of weakness can go unnoticed for a very long time. Rock climbers asked me if I was serious when I showed them a Gibb lock and told them it was expected to take falls.
 
Mar 26, 2011
2,910
Corsair F-24 MK I Deale, MD
This one looks good
- Will (Dragonfly)
It is not self-locking. The ISO standard does not require that, but most users do. That said, I like screw locks for certain things.

There are many options. From left to right, ISC. Kong, Wichard Proclip, Wichard wire gate, Plastimo Gibb, Spinlock Race. The ISC has two triggers, which makes it safe but a little awkward at first. The Kong is well tested. The Proclip Is different but quite strong.