Camp TuberA Belay Device is any device used to stop a rope. Some belay devices allow to belay the first climber, other are used to belay the second climber. Multipurpose belay devices allow to belay in both situations and to rappel.

In the last 20 years belay devices have evolved immensly, passing from simple tubers, like the one on the right, to assisted-breaking  mechanical devices. In this article we will review the main categories of devices. If you need more information about specific devices you can search our news and posts.

Assisted-Breaking devices
Non-Mechanical assisted-breaking devices
Tubers & Co. – Classic Manual Belay devices
Guide Mode. The most versatile devices
Italian hitch
The 8 Figure


Mechanically Assisted Breaking Belay Devices, such a long name, climbers often call them ‘automatic’ but that is false and misleading. NO belay device on the market is ‘automatic’. They help to lock the rope in case of a fall, guaranteeing major security and limiting human error. That is it.

Assisted-breaking devices use diverse and very simple mechanical means to bite on the rope when it is rapidly pulled, similarly to what happens with our seat-belt. They have become very popular with the wide spreading of indoor and outdoor sport climbing as they can be safer and make it easier to hold climbers taking long rests on difficult routes.

The most famous assisted-breaking devices today are the GriGri 2 (by Petzl), the Vergo (by Trango) and the Matik (by Camp).

Petzl Grigri2
Petzl GriGri plusTrango Vergo


Rope Diameter(mm)
Weight (g)
Price (€)
PetzlGriGri Plus8.5 – 11200150★★
PetzlGriGri 28.9 – 1118565★★★★
Wild CountryRevo8.5 – 11245130★★★★★
CampMatik8.6 – 10.2276199★★★★★
TrangoCinch9.4 – 1118285★★★
TrangoVergo8.9 – 10.719099★★★★
EdelridEddy9.0 – 11360120★★★★
MadrockLifeguard8.9 – 111989★★★★


Although these devices seem to be safer than other non-mechanical devices, we’ll soon see that this is not a rule.

If on one hand devices such as the GriGri2 and the Cinch can help the belayer stopping the rope in case of fall, on the other hand, their sudden locking generates a shock that is discharged to the last anchoring point, and partially to the climber. The tension provoked to the last anchoring point can easily be tolerated by new and well-fitted stainless-steel spits, but it unthinkable of using self-locking devices on old spits, multi-pitches or alpine-style (traditional) routes.

Furthermore, many climbers using assisted-breaking devices rely too much on their mechanism, not paying enough attention to basic safety guidelines. Absent-minded usage develops bad habits which become hard to eradicate and puts climbers at risk. Many belayers ignore how to properly use assisted- braking belay devices and many more, although knowing the how-to, often use them improperly. The most occurring mistake is allowing slack by pressing with the thumb on the GriGri2 lever. Have you ever done it, or seen people doing it? Do you know what happens if the climber falls when the belayer does that?

It is very important to learn the proper use of each assisted-breaking belay device, and always pay attention not to fall back on bad habits. Our instructors at Climbing Sardinia teach the safest way to use these devices, but it is also possible to enrol on a course on your local climbing gym or watch the instruction videos on Youtube.

These are the instruction videos released by Petzl, Trango and Edelrid.

How to use correctly a GriGri (Petzl)
How to use correctly a Cinch (Trango)
How to use correctly an Eddy (Edelrid)


At the beginning of 2013, a few manufacturers released -almost simultaneously- a new generation of hybrid belay devices. These new devices sit middle-way between the old tubers and the newer mechanical-assisted braking devices.

Assisted braking devices help to lock the rope even with slight pulling force, but should not be understood as ‘self-locking’ devices. As opposed to mechanical assisted-breaking devices, they have no locking mechanisms and no levers, relying on their shape to catch the rope. They require full control and constant attention from the belayer, who must always keep a hand on the feeding side of the rope to create that minimum resistance necessary for the device to move to a locking position.

The first generation of assisted braking devices included the Click-Up by Climbing Technology, the MicroJul and MegaJul by Edelrid and the Smart and Smart-Alpine by Mammut. More recently Salewa released the Ergo (2015) and Black Diamond will release its new Pilot in 2017.

Climbing Technology
Click Up
Climbing Technology Clickup
Edelrid MicroJul
Smart Mammut
Salewa Ergo
ATC Pilot


Rope diameter (mm)
Climbing TechnologyClick Up8.6 – 10.5111565
Climbing TechnologyAlpine Up7.3 – 10.5217585
EdelridJul28.9 – 11110535
EdelridMicroJul6.9 – 8.526235
EdelridMegaJul7.8 – 10.526535
EdelridMegaJul Sport8 – 112??
MammutSmart8.7 – 10.518230
MammutSmart Alpine (small)7.5 – 9.5212545
MammutSmart Alpine (large)8.7 – 10.5213545
SalewaErgo8.6 – 11117070
Black DiamondATC Pilot8.7 – 10.518640


Once these belay devices have reached their locking position it is very easy to keep them locked with very minimal aid. They have no excessive metal parts, no levers to be pushed or pulled, and thus much lighter than heavy belay devices such as the Eddy or the GriGri. Many instructors believe that the need for constant attention and the absence of possible obstructions to the mechanical locking system make these devices harder for the belayer but safer for the climber.

Some of these belay devices (Alpine Up, MicroJul, MegaJul and Smart Alpine) can also be used on multi-pitch routes to belay the second climber.

A note must be made on the Edelrid Micro Jul and Mega Jul. These devices were developed by Edelrid to go with their thinnest double ropes. The Mega Jul is suitable for ropes with a diameter between 7.8 and 10.5 mm, while the Micro Jul can work with thin double ropes with a diameter between 6.9 to 8.5 mm. The Micro Jul was developed specifically and is sold together with the Flycatcher rope, of diameter 6.9mm.


Modern belay devices (aka Tubers) were created in the eighties by merging the old Stitch and the primitive Tubers, which had plenty of problems getting jammed or over-gripping.

Black Diamond released its first ATC (Air Traffic Controller) in 1998 and since then many brands have re-used the same design in slightly different variations. All manual belay devices use simple friction to stop the rope, allowing a bit of slack to a falling climber. This is a significant and positive feature of Tubers and other such dynamic devices. Just a couple of inches of slack can reduce the impact force a climber experiences at the end of a fall and the pressure exerted on the last anchoring point.

Black Diamond
Mono Tuber
Crag Light
Wild Country
Pro Lite


Rope Diameter (mm)
Weight (g)
Price (€)
Black DiamondATC7.7 – 117018
CampShell8 – 115015
Climbing TechnologyDoble-V Row7.7 – 10.57613
DMMMantis7.3 – 114518
Mad RockWingman8 – 127012
MammutCrag Light7.5 – 10.55820
OcunHurry7.8 – 9.54315
PetzlVerso7.5 – 115720
SalewaMono Tuber7.7 – 114720
Wild CountryPro Lite7.7 – 115822

Regardless of the myriad of new mechanical and non-mechanical assisted braking devices, tubers continue to be an essential item for all climbers. Instructors keep using them as a basic device in teaching the basics of both belaying and abseiling. The most popular tuber is still Black Diamond’s ATC, followed by Petzl’s Verso. Many brands produce similar tuber-style devices and keep developing new models, with minor changes to increase friction or diminish weight.

Note: to use a tuber in complete security, every climber must learn the basics and pay extreme attention in giving and taking the rope.



If the ATC belay device was created by merging the Stitch with the Tuber, Guide Mode belay devices were born from the merging of the ATC with the GiGi.

Just by adding an extra loop at the back end of the device and a smaller one in front, they become the most versatile tool a climber can dream of. The back ring can be attached to an anchoring point, converting the device in a self-locking belaying plate for the second climber. The smaller ring in front of the device helps to release pressure on the rope when in locking position to give slack to a second climber.

The Guide plate has probably become THE essential climbing device. It can be used from belaying the leader and the second to abseiling and even ascending a rope. Proper training is required to use these devices.

The most popular guide devices are Petzl Reverso 4, Black Diamond ATC Guide and Wild Country Pro Guide Lite. The three of them are very similar in shape and features although the Reverso 4 seems to be appreciated by the most. There are of course many other similar devices, such as the new Pivot by DMM and the BeUp by Climbing Technology.

DMM Pivot
Bionic Alpine
Climbing Technology
Be Up
Rope Diameter (mm)
Weight (g)
Price (€)
Black DiamondATC Guide7.7 – 118830
CampPiu’28 – 118023
Climbing TechnologyBe Up7.3 – 10.58526
DMMPivot7.3 – 117235
Mad RockAviator8 – 119916
MammutBionic Alpine7.5 – 10.58040
MammutBionic Alpine Wall7.5 – 10.57025
OcunFerry7.8 – 118423
PetzlReverso 47.5 – 115930
SalewaAlpine Tuber7.7 – 118425
Wild CountryPro Guide Lite7.7 – 117630

PS: maybe you’re wondering about that classic plate Gigi by Kong?  Although being a great self-locking device, it could be only be used to belay the second climber and to abseil.  It does not allow belaying the leading climber and thus it has become a redundant piece of equipment, substituted by modern and more versatile devices.



The Munter hitch, aka Italian hitch, is a dynamic locking knot that does not require any device, just a rounded carabiner know as HMS (HalbMastwurfSicherung). Although one of the oldest ways of belaying, with problems analogous to the eight-figure, it is a quick, efficient and indispensable knot all climbers should know. It has many crucial advantages such as belaying both a leading and a second climber with minimal equipment, belaying in any direction (as opposed to tubers which require an 180 degrees angle to create friction) and abseiling with single and rouble ropes. It also allows a bit of slack at the end of a fall, diminishing the force exerted on the last anchoring point.

Knowing how to use a Italian hitch can be vital in case of emergency, or when all equipment is lost. When learning how to do an Italian hitch it would be useful to do it using one hand only. This is to be ready for an emergency in which you’d have one hand free, while the other grabs the rope or the rock. A simple loop helps locking the Italian hitch when the climber needs resting for long intervals.

When climbing on multi-pitches, the Italian hitch is the only knot or device that can  be used on traverses, as it can lock the rope in whichever direction it goes. It is important to position the load side of the rope on the sturdier side of the karabiner.


The eight-figure was largely used before the development of tubers, and some aficionado keep using it although it tends to curl up and consume ropes. The eight-figure performs wonderfully in abseiling, allowing smooth descents and dissipating heath without burning your hands and the rope.