It can be a confusing piece of kit as it was originally designed as a kind of prusik-brake for abseiling(something its not very good at!).Then it was touted as a fall-arrest device(many IRATA instructors still swear by it),and allso as a mechanical-prusik for rope ascents.
Its no small wonder therefore that climbers either love it,or hate it! I fall into the former category.
If you Google up "roped soloing" you will find loads of climbers on Youtube using it in strange and mysterious ways to climb fixed-rope routes on crags all over the planet.Allso if you Google up "Shunt Fall-Tests" you will likewise find some great corporate videos of it being tested to destruction.There are lots of these so i wont bother linking any.But its a great idea to check them out if you realy want to know how tough the Shunt realy is!?
Getting it to run hands-free for solo-mountaineering is not easy,but once understood it gives you a simple,versatile device for self-belay on both "Single and Double" rope systems.No other device available on the climbers market today does this!
Like all the other self-belay inovations i present in these blogs,the Shunt has a smooth friction-cam,rather than teeth that can cause damage to a rope in a fall.The most damage you will incur to your rope in a factor-2 on Shunt is a little welding or scorching to the mantle on one side! The Shunt is unique in that it allso takes Double as well as Single rope systems from 8mm to 11mm diameter.
You can allso feed the Shunt from a sack or shoulder-slung rope bag,or have the climbing rope trailing over the shoulder to the ground or hanging as in "Big wall aid-climbing",should you wish to climb without an encumbering rope-coil on your body.
Picture(1)-Shows double ropes trailing in Solo Rope Drag fashion on an Alpine style ascent.I am not a big fan of this due to potential snagging or rope damage,but it is a good workable technique to cut down body weight on long alpine soloes.
Note that the trailing ropes run through Krabs on the back of the harness to minimise leg tangles.