The DMM Captain Hook is *very* nicely made and works reasonably well for simple traverses and remote work positioning. It takes a little 'finesse' to set and retrieve but it's easily carried and used. It is *not* for 'primary' life support but will come in handy in special situations.
Available from TreeStuff.com:
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![](https://s2.save4k.ru/pic/NauRUZ4mvGo/maxresdefault.jpg)