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Black Diamond RockLock Screwgate Carabiner

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    53 Reviews


    RockLock Screwgate Carabiner

    The RockLock Screwgate Carabiner is Black Diamond's biggest biner for belaying, top rope anchors, and long-lasting durability in the climbing world. Black Diamond designed this locker with a keylock nose for snag-free unclipping, a curved spine for a larger gate opening, and a square hinge to hold your belay device in place.

    • Black Diamond's largest screwgate locking carabiner ideal for belays
    • Keylock nose eliminates snagging while unclipping
    • Screwgate lock is simple and secure
    • Item #BLD00HF

    Tech Specs

    Gate Type
    screw lock
    keylock nose
    Major Axis Strength
    24 kN
    Minor Axis Strength
    7 kN
    Open Gate Strength
    7 kN
    Gate Opening
    21 mm
    Claimed Weight
    3 oz
    Recommended Use
    Manufacturer Warranty
    1 year

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Favorite big locker

    • Familiarity: I've put it through the wringer

    These are my go to for anchors. Super solid, big, and bomber. Looking at adding the auto lock and magnetron versions.

    Very solid Carabiners

    • Familiarity: I've put it through the wringer

    Black Diamond nails it again with these carabiners. The screw-gate is secure, the opening is big enough for thicker diameter rope. These carabiners are essential for setting up anchors or for hooking up you belay device. Haven't had any problems with cross-loading.

    works as intended

    • Familiarity: I've used it several times

    Relatively new to climbing. Used BD stuff for BC skiing and other outdoor pursuits so figuring the company made their name in climbing equipment first (check out their history...Chouinard--yeah, that guy) and with hearty recommendations from friends, figured I couldn't go wrong. Figure I'll be back for more as I've got the climbing bug hard right now...

    Great Locker, Great Price!

    • Familiarity: I've put it through the wringer

    I've been buying/using the RockLock Screwgate Carabiners for years, and I'm beyond excited that BD finally updated the color and is no longer the ugly Mocha color! The shape is great, the weight is great, and the price is very competitive with similar lockers.

    My Go-To

    • Familiarity: I've put it through the wringer

    This is an easy biner to use, plus it's at a great pricepoint. I've bought more than I'll ever need and definitely use them for casual things around the campsite in addition to building anchors or belaying.

    Great biner!

    • Familiarity: I've put it through the wringer

    A solid biner for all your climbing needs. Love using this for building anchors for TR. Nothing to complain about. Its a nice large, functional biner.

    Gets it done!

    • Familiarity: I've used it once or twice and have initial impressions

    While relatively new to climbing and still building my arsenal of gear, I love this biner. I'm a fan of the size and versatility of this thing. I'll definitely be buying more of these in the future.


    • Familiarity: I've put it through the wringer

    I've bought them before and I'll buy them again. This is a great biner for most anything! They are round enough to make an easier time for multipitch belaying as well as perfect for a regular belay device carabiner or burly enough to rely on for anchors! They're great for anything and hard to wear out. 10/10

    Big boy with a lock

    • Familiarity: I've put it through the wringer

    I got a few for boating applications as the screw gate is a necessity in whitewater. They work great to hold down an ammo can or in a z-drag.

    Great value

    • Familiarity: I've put it through the wringer

    I have quite a few of these because they are durable and affordable. I use them as my go to for setting up top rope for climbing, rappels for canyoneering, belay devices and other odds and ends with my activities. You definitely can't wrong with these and for the price you can bulk up your supplies.

    Burly for belaying and anchor building

    • Familiarity: I've put it through the wringer

    My favorite biner for belaying or for toprope- the large diameter of the metal ensures smooth rope movement with less drag. Two of these make an excellent top rope setup attached to the anchor. Not the best for trad, as they are a little heavy. I prefer the Petzl Attache or other similar lightweight locker. But for single pitch sport, top rope, or gym climbing, this is my favorite.

    Best Belay Biner

    • Familiarity: I've put it through the wringer

    This carabiner compliments any ATC so well. They are big and durable which allows them to outlast much rope drag. I also really like how they are round, smooth, and easy with the rope. It is reassuring to know that when there is a lot of tension on the rope held by the carabiner that it is not harming the rope in any way. I have one of these for every ATC that I have and I have not had any regrets.

    It works.. but I hate the screwgate

    • Familiarity: I've used it several times

    The biner itself is sturdy and large, but the screw motion of the gate feels cheap and poor. If you've touched a screw gate on a Petzyl, they feel great--tight, smooth, clean, and secure. The Rocklock feels cheap and inaccurate and displeasurable. I'd recommend the Petzl Attache or Wiliams Locker over this one. Still a great locker that will do the job, though. But I won't be buying more.