Petzl Shunt

1 review
5-star:   0
4-star:   0
3-star:   0
2-star:   0
1-star:   1



Unnecessary, "psychological" backup. I was terrified…

Rating: rated 1 of 5 stars
Source: bought it new
Price Paid: retail


Unnecessary, "psychological" backup.


  • Creates a sense of security


  • Creates a false sense of security

I was terrified of rappelling and ascending ropes 14 years ago. So I bought the Shunt as a "back up" in case I messed up a rappel.

The Shunt connects from your harness to the rope above your rappel device. To descend, you must use your non-dominate hand to hold open the cam. If you let go, the cam slams shut, pinching the rope and halting your descent.

To that end, this device works fine.

HOWEVER, human nature in a fall is to grab hold and squeeze tighter. In a panic situation, a person does not unconsciously let go (next time you're with a driver who slams on the brakes, notice your clenched fists afterwards). So in order for the Shunt to actually work, you have to intentionally let go at a moment when your nature reaction is to squeeze tighter.

The Shunt gave me the initial psychological security I needed to get use to rope work. But once I became familiar and accustomed to my equipment, I realized how useless this piece of equipment really is.

Save your money and take a quality rappelling class!

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Manufacturer's Description

Visit Petzl's Shunt page.

Retailers' Descriptions

Here's what other sites are saying:

Used below the rappel device, the Shunt Rope Clamp from Petzl works as a rappel back-up and replaces self-jamming knots like the Prusik. Works on single and double ropes.


The Petzl Shunt multi-purpose device is designed for ascending as well as a backup brake for rappelling, occasional self-belays, or top rope belays.


Used below the rappel device, the Petzl Shunt works as a rappel back-up and replaces self- jamming knots like the Prusik. Works on single and double ropes. Easy to install on the rope Smooth clamping surfaces won't damage rope May be used to ascend single or doubled rope

- OMCgear

Backup device ascenderA mechanical replacement for selfjamming knots Prusik Machard etcbull When positioned below the descender the SHUNT can be used as a backup device to protect a descent on rappelbull Brakes when device is releasedCertificationCE UIAATechnical specificationsFor use on single ropes 10 to 11 mm or double ropes 8 to 11 mm188 gNote that this item of climbing safety equipment is nonreturnable Please call us toll free at 8772368428 or email bentgatebentgatecom with any questions