Use the Petzl Trigrest Hand Rest when you need to cross over or choke up before a big move. Since it has a tool-less adjustment system, it"s easy to slide this hand rest up and out of the way when you need the shaft to go in deep on alpine climbs. In the low position, this hand rest provides a brace for your index to boost grip strength and planting precision. The Trigrest works with the Petzl Quark, Nomic, and Ergo, and it weighs 19 grams.