Tube devices are light and versatile; assisted-braking models add a mechanical braking function, with passive and cam-assisted designs working differently. Guide-mode devices can belay a second from an anchor. Match the exact rope range and keep a hand on the brake strand with every device.
Belay devices differ in how they manage friction and what rope systems they support. Choose one by the exact model’s instructions and learn it from a qualified instructor.
Device types
| Type | Braking approach | Considerations |
|---|---|---|
| Tube | Friction from the brake hand | Simple and versatile; the belayer supplies the braking control |
| Passive assisted braking | Geometry pinches the rope under load | Device-specific handling and lowering technique |
| Cam-assisted braking | A moving cam adds a blocking action | Check the approved rope range and use the maker’s method |
| Guide-mode tube | A tube device with an anchor belay mode | Intended for belaying a second from an anchor when used as instructed |
Rope compatibility
Every device lists approved rope types and diameters. A rope that feeds differently or falls outside the approved range can change handling. Check the device manual and the exact rope label together. See our single, half and twin rope comparison.
Brake-strand control
Petzl’s GRIGRI instructions and REVERSO instructions require the belayer to keep a hand on the brake side of the rope. Assisted braking is not hands-free belaying.
Certification and carabiner pairing
Petzl identifies the GRIGRI with EN 15151-1 and the REVERSO with EN 15151-2. UIAA lists UIAA 129 for braking devices. Check each product’s label and manual. The device manual also governs carabiner shape, orientation and compatibility; compare belay carabiner shapes and locking systems.
Practice with an experienced instructor before using unfamiliar equipment. Browse ropes and protection.
Common questions
What belay device should a beginner learn?
Learn the device taught by your instructor or climbing gym and use it exactly as its manual describes.
Are assisted-braking devices hands-free?
No. Assisted braking does not remove the requirement to keep a hand on the brake strand.
What is guide mode on a belay device?
Some tube devices can belay a second climber from an anchor in guide mode. Follow the exact device instructions and learn the method from a qualified instructor.
What does EN 15151 cover?
Petzl's GRIGRI is listed under EN 15151-1 and its REVERSO under EN 15151-2. Check the exact device marking and instructions.