Black Diamond  GridLock Belay Screwgate Locking Carabiner

I'd recommend this biner for 1) gym climbing, 2) short/easy approach climbing, and 3) single-pitch. It's really nice that it is less likely to cross-load, but it is a fickle piece of gear that takes two hands to maneuver it in correctly. Once it's set up it's great. However, if you anticipate that you may need your large locking biner to do anything other than act as a belay biner, or if you think you'll need to set it up quickly and with one hand, you should consider something else. I'm hesitant to recommend it since it is such a specialized piece of gear.

I love this carabiner! Thanks Black Diamond! the only things i think it lacks are 1.) make a twist-lock version! 2.) if you dont get the belay loop into the small opening by mistake, and it "Flipps" while belaying, the rope is now running on the outside of the spine-keeper thing and can get stuck or is running over a sligntly sharp edge! Make sure the belay loop is inside the smaller area! BD could make this spine a lot smoother just in case this happens, or make that little spine "spring loaded".

I was very excited to purchase the product. I thought the concept of the carabiner that wouldn't cross load was fantastic. Using it for the first time, I was very disappointed to find how non-user friendly this carabiner was. It took a great deal more time to set up my belay, made me nervous about dropping my grigri, and overall didn't sit right with me.

I was having issues using a normal Carabiner with an ATC Guide and GRIGRI at times; crossload. So to be a better belayer and to be SAFE, I got this product. It's very lightweight and easy to use, but I found using a grigri the normal way could lead to crossload. To avoid this, I flipped the gridlock around so the grigri is in the narrow area. Other than that, it is a must have but wish it was autolocked.

Thought this was a gimick until I handled one. Over all it is smaller and lighter than the BD Rocklock. The added safety is a great bonus to traditional lockers, and much lighter than other brand's solutions. With that said after using it for a month I will not take it alpine climbing because it adds to the potential of accidentally dropping your belay device and/or opening on your harness.

Got this bad boy for belaying... Loved it so much, got another to attach to my personal anchor. It's great that one end of the carabiner can be designated for only one task. It's 100% for the personal anchor and about 95% for a belay carabiner. The only issue I have with it as a belay carabiner is that getting the belay loop out of the bottom part of the biner can be a wee bit tricky.

Takes a minute to figure, a couple of uses to get proficent with setting up & a huge leap in safety. Cross loading is a thing of the past when using this carabiner. ALWAYS check, do not use this as crutch & become complacent! It works as intended, it is always my reccomendation that folks use this on their harness in every teching situation wether a new partner or a formal workshop.

Found this just browsing around and thought i would give it a try. I am not disappointed in anyway. Its simple and easy and stays correctly orientated. Takes away the fear of cross loading. All the weight stays on the spine which i love to have for my biners. Locking this has been easy an so far no problems. Overall an amazing biner.

I found this tedious to set up, especially on larger belay loops. I definitely ditto the comments about alpine/multi-pitch climbs and the increased likelihood of dropping your belay device. 4 People called it simple, but it is not simple compared to a regular belay 'biner. I'd like to try the DMM set up and wish REI carried it.

This is the best belay carabiner design I've ever used. It stays perfectly centered and is easy to use. I spend a lot of time solo climbing. Combining the Gridlock with a Petzl minitraction provides maximum security and a great feel when top roping alone.