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Auto-locking carabiners

Climbing carabiners allow you to attach all your gear to your harness, set up an anchor, belay the lead climber, or abseil using a descender. At Glisshop, we offer no fewer than 25 models of auto-locking carabiners for maximum safety, including H-type (HMS) models for belaying and B-type models for all other common manoeuvres. Carabiners come in three main categories: non-locking straight or bent gate carabiners, traditional screwgate models, and the latest generation of auto-locking carabiners with 2- or 3-action mechanisms.

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Petzl Carabiners Am'd Twist Lock Overview Petzl Carabiners Am'd Twist Lock Detail
Petzl
Carabiners Am'd Twist Lock

  • Recommended price

    £21.51

    -28%

    £15.30

Petzl's 'Am'd Twits-Lock is a D-shaped carabiner with a two-movement lock that is perfect for connecting to a grigri, a figure eight, a single connection to an anchor, etc.
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Petzl Carabiners Sm'd Twist Lock Overview Petzl Carabiners Sm'd Twist Lock Keypoints
Petzl
Carabiners Sm'd Twist Lock

  • Recommended price

    £18.81

    -19%

    £15.21
Petzl Carabiners Omni Triact-Lock Overview Petzl Carabiners Omni Triact-Lock Keypoints
Petzl
Carabiners Omni Triact-Lock

  • Recommended price

    £31.41

    -20%

    £25.11

The Petzl Omni Triact-Lock carabiner combines symmetrical shape, triple locking and sturdiness to effectively secure your attachment points during technical practices.
Black Diamond Carabiners Pearlock Twistlock Carabiner Gray Gray Overview Black Diamond Carabiners Pearlock Twistlock Carabiner Gray Gray Side
Black Diamond
Carabiners Pearlock Twistlock Carabiner Gray Gray

  • Recommended price

    £17.01

    -10%

    £15.30

The Black Diamond Pearlock Twistlock Carabiner Gray is an ergonomic and lightweight carabiner, ideal for efficient and safe belaying.
Colour
  • Black Diamond Carabiners Pearlock Twistlock Carabiner Gray Gray Overview
Edelrid Carabiners Hms Strike Triple Silver Overview Edelrid Carabiners Hms Strike Triple Silver Detail
Edelrid
Carabiners Hms Strike Triple Silver

  • Recommended price

    £19.71

    -22%

    £15.30

The Edelrid HMS Strike Triple Icemint is an HMS carabiner with a three-movement closure for increased safety.
Colour
  • Edelrid Carabiners Hms Strike Triple Silver Overview
Edelrid Carabiners Pure Slider III Oasis Overview Edelrid Carabiners Pure Slider III Oasis Detail
Edelrid
Carabiners Pure Slider III Oasis

  • Recommended price

    £17.91

    -19%

    £14.40

-
Colour
  • Edelrid Carabiners Pure Slider III Icemint Overview
  • Edelrid Carabiners Pure Slider III Oasis Overview
Black Diamond Carabiners Rocklock Triple Lock Gray Overview Black Diamond Carabiners Rocklock Triple Lock Gray Side
Black Diamond
Carabiners Rocklock Triple Lock Gray

  • Recommended price

    £19.71

    -18%

    £16.11

The Black Diamond Rocklock Triple Lock Gray is a forged aluminum HMS carabiner designed for belaying and rappelling, featuring a triple-action automatic locking system for safety and ease of use.
Colour
  • Black Diamond Carabiners Rocklock Triple Lock Gray Overview
SALES
C.A.M.P. Carabiners Atom 2Lock Overview C.A.M.P. Carabiners Atom 2Lock Detail
C.A.M.P.
Carabiners Atom 2Lock

  • Recommended price

    £18.81

    -14%

    £16.11

The Camp Atom 2Lock is an HMS carabiner with an automatic two-movement locking system for greater safety.
Petzl Carabiners Freino Overview Petzl Carabiners Freino Detail
Petzl
Carabiners Freino

  • Recommended price

    £40.41

    -22%

    £31.41

The Petzl Freino is a braking carabiner that can be used as a single rope with a Grigri or descenders such as the Petzl Stop or Petzl Huit.
Edelrid Carabiners Hms Bullet Triple Icemint Overview Edelrid Carabiners Hms Bullet Triple Icemint Detail
Edelrid
Carabiners Hms Bullet Triple Icemint

  • Recommended price

    £21.51

    -22%

    £16.65

-
Colour
  • Edelrid Carabiners Hms Bullet Triple Icemint Overview
Edelrid Carabiners Hms Bulletproof Triple Slate Overview Edelrid Carabiners Hms Bulletproof Triple Slate Detail
Edelrid
Carabiners Hms Bulletproof Triple Slate

  • Recommended price

    £26.91

    -16%

    £22.41

-
Colour
  • Edelrid Carabiners Hms Bulletproof Triple Slate Overview
Edelrid Carabiners Hms Strike Slider FG II Oasis Overview Edelrid Carabiners Hms Strike Slider FG II Oasis Detail
Edelrid
Carabiners Hms Strike Slider FG II Oasis

  • Recommended price

    £25.11

    -21%

    £19.71

-
Colour
  • Edelrid Carabiners Hms Strike Slider FG II Oasis Overview
Grivel Carabiners Mega - K6G Twin Gate Orange Overview Grivel Carabiners Mega - K6G Twin Gate Orange Detail
Grivel
Carabiners Mega - K6G Twin Gate Orange

  • Recommended price

    £17.01

    -20%

    £13.50

The Grivel Mega - K6G Twin Gate is an HMS-type carabiner, made of forged aluminum and featuring a Twin Gate double locking system.
Colour
  • Grivel Carabiners Mega - K6G Twin Gate Orange Overview
Beal Carabiners Orient Express Bi-Matic Overview Beal Carabiners Orient Express Bi-Matic Detail
Beal
Carabiners Orient Express Bi-Matic
  • £19.70

The Beal Orient Express Bi-Matic carabiner combines safety, practicality and lightness thanks to its automatic locking system and ergonomic aluminium design.
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Edelrid Carabiners Oval Power 2500 Triple Night Overview Edelrid Carabiners Oval Power 2500 Triple Night Detail
Edelrid
Carabiners Oval Power 2500 Triple Night

  • Recommended price

    £17.01

    -10%

    £15.21

-
Colour
  • Edelrid Carabiners Oval Power 2500 Triple Night Overview
Grivel Carabiners Plume HMS - K3GH Twin Gate Orange Overview Grivel Carabiners Plume HMS - K3GH Twin Gate Orange Detail
Grivel
Carabiners Plume HMS - K3GH Twin Gate Orange

  • Recommended price

    £13.14

    -16%

    £10.98

The Grivel Plume HMS – K3GH Twin Gate Orange is a compact and lightweight HMS carabiner with the Twin-Gate system that prevents unwanted openings. 
Colour
  • Grivel Carabiners Plume HMS - K3GH Twin Gate Orange Overview
Edelrid Carabiners Pure Slider III Icemint Overview Edelrid Carabiners Pure Slider III Icemint Detail
Edelrid
Carabiners Pure Slider III Icemint

  • Recommended price

    £17.91

    -19%

    £14.40

-
Colour
  • Edelrid Carabiners Pure Slider III Icemint Overview
  • Edelrid Carabiners Pure Slider III Oasis Overview

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Pros of an auto-locking carabiner compared to a screwgate model

Superior handling:

No more tedious screwing and unscrewing of the locking sleeve every time you open the carabiner. With an auto-locking model, you can open and close it single-handedly in seconds.

Enhanced safety:

The auto-locking carabiner has the major advantage of closing and locking itself automatically as soon as you release the gate. The spring-loaded gate snaps back into place, and the integrated 2- or 3-action mechanism ensures a secure closure. You can therefore use any self-locking carabiner that appears closed with confidence, if it looks shut, it is fully locked.

Cons of this type of carabiner

Auto-locking carabiners can be more temperamental in winter conditions, whether in mountaineering or ski touring. The locking sleeve can freeze on the gate, making operation difficult depending on the temperature. For alpine use, it’s often better to stick with traditional screwgate carabiners.

Best uses for an auto-locking carabiner

This type of carabiner is particularly effective as a belay carabiner attached to the belay loop. It saves valuable time when alternating between climber and belayer. It’s a real advantage for indoor climbing. In other situations, the time saved is less critical, and using an auto-locking model doesn’t replace the final safety check before use.

The different types of self-locking carabiners in climbing

Manufacturers such as Petzl, Black Diamond, Beal, Grivel, Edlerid, Ocun and Camp offer several types of auto-locking carabiners. Some feature 2-action systems, while others use 3-action mechanisms.

2-action auto-locking carabiners:

These carabiners open in two steps: first, rotate the sleeve, then pull back the gate. Once released, the gate automatically locks and the sleeve returns to its original position. It’s hard to get more efficient than that.

3-action auto-locking carabiners:

For even greater security, manufacturers have developed 3-action systems. Some models also feature ball-lock mechanisms that require pressing a button before unlocking the sleeve, or dual opposing gate systems for added safety.

To refine your choice and better understand the specifics of each locking mechanism, check out our expert guide on the various types of climbing carabiners.