Petzl Pantin Foot Ascender - Left or Right .
Used either as part of an SRT system, or in addition to a DdRT system this device can make rope climbing much easier and less tiring. The climber attaches it to the ankle and stands on the Dyneema reinforced foot strap. The cam engages the rope, allowing the climber to effortlessly make progress. The toothed cam is a trigger cam with a cleaning slot so that it works even on dirty rope. Quick and easy to install, and reduces the amount of effort needed to climb. Suits use on 8-13mm rope.

To prevent annoying rope kickout, you can now add a locking Catch to your Pantin.