Best Locking Carabiners 2026
A locking carabiner is one of the most critical pieces of climbing safety gear. It connects your belay device to your harness, builds anchors, and secures rappel setups. The locking gate prevents accidental opening under load. We have reviewed the best locking carabiners for every climbing application.
How to Choose a Locking Carabiner
Locking mechanism is the key decision. Screwgate is simple and reliable. Auto-locking is faster but has more moving parts.
Key Types
Screwgate: A threaded sleeve you manually screw shut. Simple, reliable, and affordable. Requires you to remember to lock it.
Auto-Locking (Twist-Lock): Springs shut automatically when you release the gate. Faster to clip but can be harder to open one-handed.
Triple-Lock: Requires three actions to open (lift, twist, open). Maximum security for critical connections like belay setups.
Key Factors
Strength: Rated in kilonewtons (kN). Look for at least 20kN along the major axis. Most quality carabiners exceed this.
Gate Opening: Larger gate openings (20mm+) make it easier to clip ropes and gear. Important for belay carabiners.
Shape: HMS/pear-shaped carabiners work best with belay devices. D-shaped carabiners are stronger and lighter for anchors.
Weight: Ranges from 50g (ultralight) to 100g+. Matters more when carrying many on a trad rack.
Budget Guide
- Budget ($8-15): Basic screwgate carabiners — perfectly safe and functional
- Mid-range ($15-25): Auto-locking with smooth action from reputable brands
- Premium ($25+): Ultralight or specialised belay carabiners
Frequently Asked Questions
If you belay, yes. Your locking carabiner connects the belay device to your harness — it is a critical safety link. Most climbers own at least two: one for belaying and one spare. They are inexpensive and last for years.
Locking carabiners have a mechanism that prevents the gate from opening accidentally. Non-locking carabiners are used on quickdraws and non-critical connections where the gate is loaded closed. Always use a locking carabiner for belaying, rappelling, and anchor building.
Metal carabiners last many years with proper care. Inspect for deep rope grooves, gate stiffness, cracks, or corrosion. Retire any carabiner that has been dropped a significant distance onto hard ground, as micro-fractures may not be visible. Most manufacturers suggest retirement after 10 years.
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