Best Carabiners for Climbing and Hiking (2026)

The Black Diamond Oval Carabiner earns its Best Overall ranking by being the most versatile carabiner in the entire lineup. The oval shape — as opposed to D-shaped or asymmetric D-shaped designs — distributes load symmetrically, which means it holds pulleys, racks, and gear cleanly without the gear sliding to one side under weight. This is the carabiner that guides and experienced backpackers reach for when they need to organize gear, set up a pulley system, build anchors with multiple pieces, or attach accessories to a pack. The symmetrical geometry also makes it the go-to for anything involving mechanical devices like pulleys, mechanical ascenders, and friction hitches, where a D-shaped carabiner's uneven gate clearance causes problems.

Black Diamond machines this oval from 7000 series aluminum, which provides an excellent strength-to-weight ratio for a non-locking carabiner. The 23kN gate-closed rating means it comfortably exceeds the force requirements of virtually every non-climbing application and most sport climbing scenarios. The gate action is smooth and predictable: positive spring tension means it snaps closed firmly, but it opens easily with a single finger. Gate width is generous, allowing quick clipping even with gloves. The keylock nose eliminates the snagging problem that plagued older carabiner designs when unclipping from gear, a feature that matters most when you are racking and unracking repeatedly throughout a day.

At $14 per carabiner, the Black Diamond Oval is priced appropriately for a workhorse non-locking carabiner that you will use constantly. Buy several — they are the kind of gear you end up wanting five or six of on any serious backpacking trip. Important safety note: this is a non-locking carabiner and should not be used as a primary anchor point, for belay, or in any application where unintentional gate opening would create a fall risk. For those applications, pair it with a locking carabiner from our list. For the complete rack for a via ferrata or multi-pitch approach, check our trekking poles guide to complete your kit.

The Petzl Attache 3D is the locking carabiner that the professional guiding community returns to year after year as the standard belay carabiner. The 3D designation refers to the three-dimensional geometry of the carabiner body — Petzl shaped the spine to hold a belay device in an optimal friction position, reducing the likelihood of the device rotating into an inefficient or dangerous orientation during rappelling or lowering. This engineering detail is invisible until you use it with a tube-style belay device, at which point the ergonomic advantage becomes immediately apparent: the belay device stays exactly where you set it, requiring less hand correction during extended lowering sequences.

The screwgate lock mechanism is simple, proven, and reliable. To open, you unscrew the sleeve a quarter turn and push the gate; to lock, you screw the sleeve closed. Unlike auto-locking carabiners that require three distinct hand movements to open, the screwgate opens with two motions that become instinctive after a single session. The trade-off is that human error — forgetting to screw the sleeve closed — is possible. Petzl addresses this with a clearly visible locking indicator built into the sleeve: when the sleeve is fully closed, an indicator mark aligns. The 25kN major axis rating provides ample strength margin for all belay applications.

At 1.9 ounces and $26, the Attache 3D is one of the lightest and most affordable dedicated belay carabiners on the market. Its pear-shaped (HMS) body accommodates a munter hitch for emergency belay use, making it a functional backup for situations where your belay device is unavailable. The keylock nose keeps it from snagging on gear when pulling rope. Safety note: this carabiner is UIAA and CE certified for life-safety applications. Always ensure the screwgate is fully closed before weighting the carabiner. Never use with a belay device that has not been tested for compatibility with HMS-style carabiners. For more essential pack gear, see our best hiking backpacks guide.

The Black Diamond GridLock Screwgate solves one of the most persistent frustrations in climbing: belay devices and autoblock backup knots that rotate into incorrect positions during use. The GridLock's defining feature is a built-in keeper strap that attaches to the belay device loop, physically preventing the device from flipping, rotating, or shifting position during lowering, rappelling, or hauling. For guides who spend entire days lowering clients and need their setup to be reliable regardless of how much the carabiner is jostled, this is a quality-of-life upgrade with real safety implications. The device stays where you set it, every time.

The D-shaped gate geometry distributes load toward the spine of the carabiner — the strongest part — more efficiently than a symmetrical oval. This is why the GridLock's 27kN major axis rating exceeds the oval Black Diamond's 23kN despite being lighter. The screwgate lock is identical in operation to other Black Diamond locking carabiners: predictable, smooth, and easy to verify visually. The keylock nose is present and keeps the carabiner from snagging protection when retrieving gear. At 2.0 ounces, it is marginally heavier than the Petzl Attache but the GridLock's device-holding system justifies that fraction of an ounce.

At $22, the GridLock is the most affordable genuinely specialized belay carabiner in this roundup. Black Diamond includes the keeper strap as a permanent integrated feature rather than an afterthought accessory. The UIAA and CE certification confirms it meets international safety standards. Safety note: the keeper strap must be properly attached to your belay device before use — an unattached strap provides no benefit. Always verify that the screwgate is fully closed after setting up your belay station and before weighting the system. This carabiner is appropriate for all certified belay devices and is particularly useful with Grigri-style assisted braking devices where device orientation matters for proper function. A well-organized gear rack starts here — add a quality pack from our best hiking backpacks roundup.

At 0.9 ounces, the Metolius FS Mini II is genuinely impressive in the hand: it weighs almost nothing. Metolius achieved this by using a wire gate instead of a solid gate, eliminating the most significant weight component in most carabiner designs. Wire gates also provide a functional advantage beyond weight savings: they do not slam shut under vibration or impact the way solid gates can. This phenomenon — called gate flutter — can momentarily reduce a carabiner's strength during a dynamic fall by opening the gate at the exact wrong instant. Wire gates stay mechanically open or closed without the inertia-driven flutter of a solid gate, providing more consistent performance in shock-loading scenarios.

The Mini in the FS Mini II name refers to the compact body size, which is proportionally smaller than full-size carabiners. This makes it excellent for gear loops, racking smaller protection, and attaching accessories to a pack where a full-size carabiner is unnecessarily bulky. The 20kN gate-closed rating is the standard minimum for UIAA-certified climbing carabiners, which means the Mini II meets climbing use requirements despite its small size. Wire gates also have fewer moving parts than solid gate designs, which translates to better corrosion resistance and lower maintenance requirements — important for hikers who use gear in wet, salty, or dusty environments.

At $10, this is the most affordable carabiner in our lineup, and the value proposition extends far beyond the price. Stock your pack with four or five Mini IIs to attach gear, organize your kit, and keep critical items accessible without adding meaningful weight. Wire gate carabiners do require slightly more attention when clipping into protection — the thinner gate can catch on bolt hangers if you clip from the wrong angle — but this is a trivially learnable technique. Safety note: while the FS Mini II meets UIAA climbing standards, its small gate opening makes it less suitable for belay device use than larger HMS-shaped carabiners. Use it for racking, gear attachment, and sport climbing quickdraws rather than primary belay. Round out your trail organization kit with a quality bear canister from our best bear canisters guide.

The REI Co-op Carabiner Pack delivers six non-locking oval carabiners for $30 — $5 per carabiner — making it the most economical way to stock up on quality gear-organization clips. REI's house-brand carabiners are manufactured to real aluminum specifications with a 22kN gate-closed rating, which means they are genuinely stronger than many cheaper carabiners sold at outdoor retailers. They are not UIAA certified for climbing use and should not be used for body-weight life-safety applications, but for backpackers who need to attach water bottles, cookware, trekking poles, and accessories to their packs, the strength is more than adequate and the price is unbeatable.

The oval shape is the right choice for a multipurpose pack carabiner. It accommodates any gear clip point without preferential loading direction, making it easy to use quickly without orienting the carabiner correctly first. The gate action is smooth and positive, with a spring that snaps reliably closed after every clip. Each carabiner is anodized in a different color — REI includes a mix of colors in the 6-pack — which makes it easy to color-code your gear organization system. Experienced backpackers use different colors to quickly identify their water system clips, food bag ties, and camp organization clips at a glance, even in low light.

At 1.5 ounces each, these are middle-weight carabiners — heavier than the Metolius FS Mini II but more robust for repeated clipping and unclipping under load. The gate opening is wide enough to accept most pack webbing and attachment points in a single motion, which matters when you are setting up camp quickly or clipping gear in the rain with cold hands. Safety note: these are non-certified carabiners and are explicitly not appropriate for climbing, rappelling, belay, or any application where a person's weight would be suspended. Keep one or two in your pack specifically for emergency improvised use — clip a hiking pole across a stream, attach a bear bag, or organize camp — and use certified locking carabiners for any safety-critical connection. See our best trekking poles guide for more trail essentials.