Carabiners

Subcategories:

Climbing carabiners are strong, lightweight metal loops with spring-loaded gates used to connect ropes, harnesses, and gear in climbing, mountaineering, and rescue activities. They’re a core part of climbing safety systems and come in various shapes and types depending on their use.

What Is a Climbing Carabiner?

A carabiner acts like a metal clip that holds or links parts of your climbing system—such as:

  • Ropes to harnesses

  • Belay devices to anchors

  • Quickdraws to bolts

They're designed to handle very high loads and are made from aluminum or steel, with precise strength ratings stamped on them (e.g., kN = kilonewtons).

Main Types of Climbing Carabiners:

1. Locking Carabiners

These have a mechanism to lock the gate shut, increasing safety.

Locking TypeFeaturesCommon Uses
Screwgate Manually screwed closed Belaying, anchors
Twist-lock Auto-locks with a twist Fast, one-hand use
Triple-lock Extra secure, needs 3 actions High-risk scenarios (e.g. rescue)

2. Non-Locking Carabiners

No locking mechanism—used when fast, frequent clipping is needed.

Common UseExamples
Sport climbing Quickdraws, racking gear
Trad climbing Nuts, cams, slings

Shapes of Carabiners:

ShapeDescription & Best Use
D-shape Strongest shape; good for most uses
Oval Traditional shape; good for aid climbing, pulleys
Pear/HMS Wide top; ideal for belaying, rappelling
Asymmetric D (Offset D)   Common in sport climbing; lighter but strong

Strength Ratings (in kilonewtons / kN):

  • Major axis (closed gate): Usually 20–30 kN (holds your fall)

  • Minor axis (sideways): Often 6–12 kN

  • Open gate: Less strong; usually 7–10 kN

Always check for the CE or UIAA safety certifications.

Pros:

  • Extremely strong and lightweight

  • Essential for climbing safety

  • Many options for different climbing styles

Cons:

  • Can be misused if not properly locked or oriented

  • Needs regular inspection for wear and damage

Summary:

Climbing carabiners are vital connectors used to build safe and secure climbing systems. They come in locking and non-locking types, various shapes, and are chosen based on their strength, weight, and purpose in your climbing setup.

Want help choosing the right carabiner for belaying, trad climbing, or building an anchor?