Mammut Smart Belay Device


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The new Mammut Smart Belay Device offers unparalleled safety and ease of use for cragging, all in a lightweight and inexpensive package. The unique design combines very easy rope management making feeding a huge armload of slack for that hard clip easy, with a super-dependable locking feature that makes catching a hard fall very easy, even with ultra-skinny ropes. A side benefit is that this locking action makes marathon belay sessions easy while your partner dogs his project for the umpteenth time. Not for use as an autoblocking belay device.


  • Suitable for all ropes from 8.9mm - 10.5mm in diameter
  • Weight: 82 g

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Review Summary

4.6 out of 5

5 Reviews

  • Build quality: 2
  • Ease of use: 2
  • Great design: 2
  • Performance: 2

  • only for tr and sport: 1
Durability: 5 / 5
Quality: 4 / 5

5 Ratings & Reviews

Durability: 5 / 5
Quality: 4 / 5
TypeOfClimbing: Trad / 5
EaseOfUse: 3 / 5
from California
25-34 yrs

Does well what it does...
March 02, 2011

Works like a regular ATC with a handy arm, when angled down, adds a lot of friction to catch a fall without a whole lot of effort. Feeds Rope like a dream when TR and lead belaying. A little jarring when lower at first but once you get the rhythm its pretty smooth. Only thing is that this is a specific belay device for only TR and Sport so if this is all you do then I recommend it. however there are many other devices out there that are more versatile.

Pros: Great design, Build quality, Performance, Ease of use, Cons: only for tr and sport

autolocking ATC
January 06, 2010

cheapest and simplest autolocking belay device. what more is needed!

Durability: 5 / 5
Quality: 4 / 5
TypeOfClimbing: Trad / 5
from Boston,MA
25-34 yrs

only for sport climbing
February 08, 2011

everything is perfect expcet it can only be used in sport climbing. normally we use belay decive with 2 tubes that allow us to rapell. But I had 2 hard times when I got stuck by this guy. anyway, if you do not rapell. this is perfect workhorse. light, functional, and safe.

Pros: Great design, Build quality, Lasts forever, Performance, Ease of use, Great value

Simple, intuitive, and smooth!
April 24, 2009

Nice price for an assisted catch style belay device, perfect for sport or single pitch trad, and amazing for toproping. It fed really smoothly using a 10.5 rope and is probably even better with a skinny line. Lowering was a bit bouncy at the start, but you quickly get used to it, and then you can lower as smooth as ever.

Love it...
August 03, 2009

Smart belay is the middle ground between a the simplicity of an ATC and the safety of a grigri. Just staring at it may lead you to scratch your head but once you run a rope through it you'll start to realize how easy and fantastic this belay device actually is. Only draw back is that you can't do a double rope rappel off of it.

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Mammut Smart Belay Device Photo

Available sizes, while supplies last, include size and size one size: one size, .

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