| Type | Assisted-braking device |
| Maker | Petzl (often used generically) |
| Ropes | Single ropes (check model's diameter range) |
| Best for | Sport climbing, gym, projecting |
The GriGri is an assisted-braking belay device made by Petzl that uses a camming mechanism to help lock the rope when a climber falls. Widely used in sport climbing and gyms, it adds a margin of safety over tube-style devices but still requires a hand on the brake strand at all times.
How the cam works
When the rope is pulled suddenly, an internal cam rotates and pinches it, helping to arrest the fall. Lowering is controlled with a handle that releases the cam gradually. This is what makes it an assisted-braking device.
When to use it
It excels at sport climbing and projecting, where a climber may hang and rest repeatedly. For multi-pitch and rappelling, many climbers prefer a tube-style ATC — compare them in GriGri vs ATC.
Safety
The golden rule still applies: keep your brake hand on the rope. Never hold the cam open while feeding slack. This article is educational and not a substitute for hands-on instruction from a qualified climbing instructor.
Frequently asked questions
Is a GriGri safe for beginners?
It's widely used by beginners because its camming mechanism helps catch a fall, but it requires correct technique — especially keeping the brake hand on the rope and feeding slack properly when lead belaying. Improper use, like overriding the cam, removes its safety benefit, so instruction is still essential.
Can you rappel with a GriGri?
A GriGri only takes a single strand, so you can lower with it but cannot do a standard double-strand rappel. For descents that require rappelling both strands, climbers use a tube-style device instead.
What rope diameter works with a GriGri?
Each model specifies a rope range — current GriGris work best with single ropes roughly 8.5–11 mm, with an optimal band in the middle. Using a rope outside the stated range affects how well the device feeds and brakes.
Sources
- GriGri technical notice — Petzl