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No ascension system is complete without the Croll.

Ascend fixed lines with ease on your next caving expedition or big wall attempt with the Petzl Croll Chest Ascender. Use in conjunction with your chest harness and Petzl’s Basic or Ascension ascenders for a simple and efficient system.

  • The ascender's chrome-plated cam features angled teeth and a self-cleaning slot that securely grips the rope, even in icy or muddy conditions
  • Ergonomic design works with either hand
  • An ergonomic trigger and angled attachment hole make for one-handed adjustments
  • An integrated safety catch prevents the cam from opening too far
  • For use with chest and waist harness

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Petzl Croll Chest Ascender

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Here's what others have to say...

I'm looking for something to use when doing...

I'm looking for something to use when doing climbing photography for a second directional rope. I would be pulling the rope through from a side angle to adjust where I hang in mid-air. I'm going back and forth between this and a Gri Gri (which would allow me to lower off instead of detach and swing into mid air). Which should I choose?

5 5


The Croll is an integral component of my frog rig. If you need an ascender to use with your chest harness, this is the standard. The design of its housing allows it to sit flat and comfortably against your chest, and the "trigger" to operate the cam is easy to use. Highly recommended.

5 5

great piece of equipment

the chest ascender works great. good piece to have for beginners doing any type of ascending. it's good because it'll help prevent the climber/ascender from conking their head on the side of the rock. the added auto-locking device prevents any slippage. also good to have for any type of building or tower ascending. definitely does its job

which type of carabiners do i use to connect...

which type of carabiners do i use to connect a petzl croll to my petzl navaho bod harness.

Best Answer Responded on

I would probably go with a Petzl OK locking biner. The classic oval shape helps everything sit right when weighting and unweighting.

Responded on

I would strongly recomend the use of a Maillon Rapide. Carabiners attached at the harness can easily be crossloaded as they become entangled in all the clutter of your attachment point. Rapieds are rated full strength in all directions and are the preferred attachment method. Also there the efficiency of an ascending system like the Frog system is impacted by how low the Croll is attached to the harness. Rapide's offer the the most compact attachment method for these systems.

5 5


These are life savers when ascending. I have used them in conjunction with frog and rope walker systems. The mechanism does take some getting used to, but is not hard to operate. Absolutely no slip on the rope and makes for easy changeovers.