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Locking Carabiners

Top Picks

How we choose: The best locking carabiners highlighted here were selected based on 27 reviews of 23 products. Our top picks are those that are readily-available in the United States and have received the highest overall ratings from reviewers.

How we test: Trailspace is powered entirely by our community of readers. The reviews posted here reflect the real-world experiences of outdoor enthusiasts just like you.

If you've used a locking carabiner that you think should be listed here, please share your experience.

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DMM Belay Master 2

user rating: 5 of 5 (1 review)

Excellent product, vey well designed and made. it's perfect for the job (belaying/rappelling carabiner).

Reasons to Buy

  • Large enough for its purpose
  • Folding catch indicates proper closure
  • Prevents cross loadings
  • Not made in China!

Reasons to Avoid

  • Can't think of any

Bought the Master 2 exclusively for my tube-type belay device and love it. I've used it now for a few weeks and plan to get a second one soon (backup in case of loss or theft). The "pivoting catch" assures me that my 'biner is locked properly and will not cross load whether belaying or rappelling. It's foolproof because of that folding catch and thus provides visual peace-of-mind for me and the climber—I can lock it and forget about it. I've read elsewhere that the folding catch is a PITA, but I don't see that at all.

Read more: DMM Belay Master 2 review (1)

Petzl William Ball-Lock

user rating: 5 of 5 (1 review)

This carabiner, the Petzl William Ball-lock is the metal sleeve successor to the plastic-sleeved ball-lock. This is my primary locking carabiner, which I use with belay devices, with munters (it is an HMS, designed to take munters readily, even on double ropes), and many other situations. The action is quick and easy with one hand - just push the ball on the sleeve and twist, then release and it locks automatically (do a squeeze check to be sure, of course, as with all lockers). I did find in Antarctica that in the cold (-30 and below), it was sometimes a bit sluggish.

Read more: Petzl William Ball-Lock review (1)

Petzl Delta

user rating: 5 of 5 (1 review)

The Petzl Delta Link provides a 25kN working load at a mere 5.29 oz. It serves for multiple connection points in a Frog Ascending System. Lightweight, tough, and reliable.

Reasons to Buy

  • Lightweight
  • Strong
  • Fits in pocket

Reasons to Avoid

  • Narrow opening
  • Difficult to thread

I use these for a number of applications—mostly climbing. They are an essential part of of a Frog Ascending system for rope climbing. One is used as the connection point between my Petzl Ascension ascender and the footloop. The other is used to attach my chest ascender (Petzl Croll) to the chest harness. With the triangular shape, there is no risk of crossloading. So you maintain the full working strength of the link at all time. I own several of these, and I find some of them screw open easily, while others are really frustrating. I actually carry a small crescent wrench on my gear loop in case I find myself in a bind. Other applications include using it to hang my hammock and store heavy gear in the rafters of my garage.

Read more: Petzl Delta review (1)

Edelrid Pure Slider

user rating: 4.5 of 5 (1 review)

It's an easy to use and lightweight autolocker, perfect for a more secure alpine sling or to use in anchoring.

Reasons to Buy

  • Easy to use and open with one hand
  • Not as bulky as most other auto lockers
  • Super lightweight compared to other autolockers

Reasons to Avoid

  • Sometimes the slider sticks a little while closing
  • Could potentially be opening by rubbing against a rock or rope
  • Expensive

I bought four of these mainly to use for anchoring and having secure carabiners for whatever I need them for. I can easily open them with one hand by putting the spine in my palm, and using my middle finger to push the slider down and open the gate. There could potentially be a scenario where a rope or rock can do this as well, but you'd have to pretty much purposefully place it in a situation where that could happen. Opening it on a rope is potentially a plus if it's really cold out and you have gloves on, you can just slide and clip.

Read more: Edelrid Pure Slider review (1)

More Reviews of Locking Carabiners

Trailspace reviewers have shared 27 reviews of 23 different locking carabiners.

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Other Types of Carabiners and Quickdraws

Find more carabiners and quickdraws reviewed in these related categories:

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