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Edelrid Mega Jul Belay Device

Mega Jul



My vote: None ( 5.2 avg )


Our most versatile belay and abseil device made of solid stainless steel for durability.
For belaying a leader or bringing up 2 seconds, also suitable for abseiling
Very lightweight construction
High braking performance assists the belayer with leader falls
Small eyelet for releasing unit with a carabiner when bringing up your partner
Rope can be paid out faster to a leader by holding device in the “open” position with the thumb
Suitable for 7.8 - 10.5 mm ropes

Retail price

US$ 39.95

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Device Type

Device Type


The most commonly used belay type also called an “ATC” or “tuber.” Other than a distinction between other belay device types, “Tube” is a rarely used term, most climbers just assume you're talking about this style when they refer to your "belay device."

Tube belay device example

Figure 8

Mostly used in rescue, canyoneering, tactical, work safety, or by old school climbers and rappellers. One reason they went out of popularity with recreational climbers is because they tend to create twists in the rope.

Figure 8 belay device example

Brake Assist

These devices assist in stopping the rope when a climber falls or hangs on the rope.

Brake Assist belay device example

Often referred to as “auto-blocking” but that’s not the official terminology because no belay device should be assumed to work automatically by itself, even if it feels like it does (or does most the time).


When simplicity is a must, or you started climbing before Tubers were the norm. Bonus: They tend to be very light weight.

Plate belay device example


For rappelling, not for belaying a lead climber or top-roping.

Descender example
Tube Brake Assist
Weight (g)

Weight (g)

In grams, the weight, as stated by the manufacturer/brand.

65 g


Teeth are only seen on tube devices. They add friction that helps grip the rope for more belaying control.

This is helpful for belaying heavier climbers. Teeth are becoming standard on new tube devices.

The belay device teeth are shown in the red circle

Worth Considering

Teeth do wear out. You can limit wear by rappelling on the side without teeth (if you don’t need the extra friction). Once they’re worn, you’ll still have a usable belay device, just less friction.

Guide Mode

Guide Mode

This is when you belay directly off the anchor instead of your harness. Guide mode is helpful if you climb outdoors a lot because it reduces the holding power required from the belayer. When your partner falls or rests, the weight of the climber is held mostly by the anchor and the belay device.

Tubers and Plates

When belaying in "guide mode," the tubers and plates turn auto-blocking. During a fall, the climbing rope pinches the slack rope, completely stopping the movement of either rope. A common guide mode setup shown below.

A double rope tubular device guide mode example

Mechanical Brake Assist Devices

There is no difference in the functionality of the device. A brake-hand should always be on the rope to ensure the climber is caught in the case of a fall. A common guide mode setup shown below.

A single rope mechanical brake assist guide mode example

Where guide mode is used

  • multi-pitch sport or trad climbs
  • single-pitch where you need to bring up a follower (say for a walk-off)

Learn More

Up to 2 followers
Belay Brake Assist

Belay Brake Assist

This is when the belay device significantly reduces the amount of holding power the belayer must exert to stop a fall and hold a climber.

This is also called "assisted-braking" as the device must hold a significant amount of the climber’s weight; this term does not include friction-adding "teeth" found on some tube style belay devices.

Confusingly referred to as “auto-blocking” or “auto-locking” these terms wrongly imply the device will always, automatically, stop a fall or hold a climber even if the belayer/rappeller is hands-free. These devices are not meant to be used without a hand on the braking side of the rope; the belayers/rapppeller brake hand should always be on the brake rope.

Worth Considering

Most of the mechanical brake assist devices only hold a single strand of rope and are not capable of double-strand rappelling (the most common method of rappel).

Rope Range (mm)

Rope Range (mm)

The range of rope diameters, in millimeters, that the manufacturer/brand specifies can safely be used.

This is the best case scenario and does not necessarily take into consideration that certified ropes have a tolerance of +/- .3 mm.

Recently, manufacturers have started to add an "optimized" rope range -- this is the range that will result in the nicest handling of the belay device.

7.8 mm - 10.5 mm ­­­


The main climbing gear certifications are CE and UIAA--and normally the UIAA creates the rules that the CE body also supports. When possible, we try to list all the certifications the product carries.

To sell a climbing product in Europe, the device must be CE certified. There are no official requirements to sell climbing gear in the US. The UIAA certification is a voluntary process.

Learn More

Rock and Ice Certifications Guide
Features of Mega Jul and Micro Jul

This video shows Daniel Gebel explaining all the features of Mega Jul and Micro Jul belay device.

Mega Jul Belay Device
Instruction of Micro Jul and Mega Jul

This video shows detail instruction of using Micro Jul and Mega Jul

Mega Jul Review
Edelrid Mega Jul Review by Julie Ellison
Mega Jul Review Test

Long video with poor sound but very informative and helpful, demonstrate all the features of Mega Jul.

Mega Jul Review
Mega Jul Review
( 6 avg )
( 6 avg )

great for multipich and ice climbing ( also good for sport climbing )

assisted braking
Crack the ice of the rope ( the Rope doesn't slip inside the device like grigri does icy rope)
I’ve used it a ton

great for multipich and ice climbing ( also good for sport climbing )

I'm mainly  bought it for ice climbing then I loved it and I use it for multipich and sometimes for sport climbing

I've been using it for two and a half years now


great for multipich and ice climbing ( also good for sport climbing )

I'm mainly  bought it for ice climbing then I loved it and I use it for multipich and sometimes for sport climbing

I've been using it for two and a half years now


Blister Gear Review no rating given just a review

The Edelrid Mega Jul is an innovative belay device. When used properly and paired with an appropriate rope system, the Mega Jul offers good assisted braking capability in a lightweight package. However, the Mega Jul is certainly not the perfect all-around belay device, which is why I continue to use other belay devices for certain situations. As with any piece of equipment, it is imperative to fully understand the strengths and limitations of the Mega Jul. For most users looking for an assisted braking device for daily use with a single rope, I would still recommend the GriGri 2. However, the Mega Jul is a very good option for an experienced team looking to increase their margin of safety when moving quickly on big routes.

Next Adventure Gear Review no rating given just a review

Overall, the Mega Jul is an extremely versatile and lightweight belay device with high braking performance that assists the belayer with lead falls. Basically it'll be there for you to protect your climber when you need it most. 

Gear Junkie Review no rating given just a review

The Mega Jul is not intuitive. I recommend you watch the instructional videos and spend time with it in low-commitment scenarios before using it in the backcountry.

Despite a rocky start, Edelrid’s Mega Jul is now my belay device of choice for all alpine and multi-pitch rock climbing. It is a light, small, durable, and multi-function device. The added security of its bomber, near foolproof assisted-braking component is reassuring on the mountain and the rock.

UK Climbing Gear Review no rating given just a review

Overall, the Mega Jul is a cleverly designed belay device that does things that similar looking devices do not, whilst offering more security. It is a bit fussy to use at first and requires a considered and experienced approach, but once you get the hang of it the Mega Jul works rather well and is particularly versatile.

Dirtbag Dreams Gear Review no rating given just a review

The Mega Jul quickly replaced my need for any other tube-style belay device. The lightweight aspect of this belay device (weighing in at 2.3oz, compared to 3.1oz for a competitive brand’s version) paired with its stainless-steel construction is what wins it my go-to vote. No wear and tear marks to be seen after extensive use. Expect the Mega Jul to last you two or more years, even if you find yourself climbing with it 200 days a year. Pair this device with the Edelrid Bruce, a locking steel carabiner (28kN major axis, 4.72oz), and your belay system will last for years.

WeighMyRack Gear Review in-depth technical review

The Micro Jul was designed to accompany their groundbreaking Flycatcher rope, the thinnest half rope on the market at 6.9mm. The problem was the Flycatcher was so skinny there wasn’t a single belay device rated to handle a rope that thin. After designing the Micro Jul specifically for skinny ropes, they realized that the belay device had so many helpful features it was worth making another one that could handle “standard” rope diameters. Thus, the Mega Jul was born, identical in functionality to the Micro Jul, differing only in what rope diameters it is designed to handle [Micro Jul: 6.9mm-8.5mm Mega Jul: 7.8mm-10.5mm].

Outdoor Gear Lab Gear Review rating 3.4/5

We were initially impressed with the promise of the Edelrid Mega Jul. This a light, compact belay device that offers assisted braking functions at a fraction of the price of the competition. Ultimately though, the performance of this passive braking assistance is a significant compromise from active assisted locking devices like the Petzl GriGri 2. It's just not as smooth or as strong. Furthermore, the Mega Jul's friction in auto-block mode was horrific. We're intrigued by the future potential of passive assisted braking devices, but aren't yet willing to recommend this one over the competition we saw.

Mediocre Mountaineering Gear Review no rating given just a review

So, given my views regarding the Alpine Up’s performance, It would seem as though it would replace my other belay devices. However, even though it’s the best performer, there are times when I still prefer the Edelrid Mega Jul or Micro Jul.

The Mega Jul and Micro Jul are significantly lighter and more compact, so when weight and space are at a premium (i.e. alpine climbing) I will usually reach for one of the Edelrid devices over the Alpine Up. Also, the Micro Jul is the only device capable of being used with really skinny twin ropes, such as the 6.9mm Edelrid Flycatcher.

Bottom line is that when I’m cragging, I generally take the Alpine Up. When I’m alpine climbing, I generally take the Mega Jul or Micro Jul.

Harry Holmes Gear Review no rating given just a review

The Mega Jul comes with the added advantage of allowing you to abseil without using a prussick. Personally I don't like abseiling so I will just stick with what I know (a prussick), but its nice to know its there.

Unfortunately the lightweight Mega Jul does seem to have some problems. I have seen 2 different images online of the exact same breakage, where the handle breaks off from the main tuber plate. This is a bit worrying, and fortunately hasn't happened to me.

Evening Sends Gear Review no rating given just a review

The Edelrid Mega Jul comes as close to being a do-it-all, one-stop-shop no-drop belay/rappel device as any I’ve ever seen. This multifunctional tube-style device is super light, feeds slack to a leader much more quickly than other devices in its category, and can be used in a number of different configurations that increase its braking power to a degree on par with mechanical auto-locking devices.