PETZL Reverso 4 Belay and Rappel Device Review (2026)

Who the Reverso 4 is built for

Petzl aims the Reverso line at climbers who move over long multi-pitch and alpine terrain and do not want to carry a separate rappel device on top of their belay device. It belays a leader on a single strand, switches into guide mode to bring up one or two followers directly off the anchor, and then serves as the rappel device for the descent, all from one piece of aluminum. That efficiency is why it shows up so often on alpine racks where weight and rack space matter more than on a single-pitch cragging day. Climbers who mostly sport climb at one crag with a fixed rope length have less reason to prioritize this kind of dual-purpose, guide-mode tool over a simpler dedicated belay device.

What the current Reverso line offers

Petzl's current Reverso is built from an aluminum frame and is rated for single ropes from 8.5 to 11 millimeters, half ropes from 7.1 to 9.2 millimeters, and twin ropes from 6.9 to 9.2 millimeters, which covers the thin double-rope setups alpine climbers favor for long rappels. V-shaped friction grooves are designed to adapt braking to whichever rope type is loaded, and Petzl markets this as helping control descents across that whole diameter range. Guide mode uses a release hole so the belayer can give slack to a second using just one carabiner. Petzl backs the device with a three year warranty, and it carries both EN 15151-2 and UIAA certification.

Setting it up and looking after it

Rigging the Reverso for a lead belay is standard tube-device threading; guide mode adds clipping the small carabiner through the anchor point and learning how it feels to release a loaded follower smoothly, which takes a few practice sessions before it becomes second nature. Because friction on thin ropes can run low without deliberate technique, newer belayers should practice adding a redirect or extra wrap before relying on it outdoors on skinny half ropes. Basic upkeep matches any aluminum belay device: rinse dirt and salt off after coastal or winter routes, inspect the grooves that see the most rope contact for sharp-edged wear, and retire it once those surfaces develop a noticeable lip rather than a smooth curve.

How it compares with the ATC-Guide and Mega Jul

Against Black Diamond's ATC-Guide, the Reverso is lighter and can rappel on thinner half and twin ropes, which the wider, heavier ATC-Guide is not built for, though the two share the same unassisted, guide-mode tube concept. Against Edelrid's Mega Jul, the Reverso gives up passive assisted braking in exchange for slightly lower weight and a rope feed most climbers find more familiar right out of the box. Climbers choosing between the Reverso and the Mega Jul are essentially deciding whether a bit of braking assistance is worth a small weight penalty on long alpine days.

Verdict and who should look elsewhere

Choose the Reverso 4 if you climb multi-pitch or alpine routes on half or twin ropes and want one light device that belays, seconds and rappels without extra bulk. It suits climbers with confident belay technique who value low weight over extra safety margin. If you want some braking assistance without moving to a cam-based device, the Edelrid Mega Jul offers a similar footprint with passive assist. Gym climbers and single-pitch sport climbers who never rappel on double strands are better served by an assisted braking device such as the GRIGRI +, which adds real protection during lowers.

Frequently asked questions