Arborist Carabiners & Climbing Hardware

Buying guide

Life-support carabiners vs gear carabiners

Not every carabiner belongs in your climbing system. For anything that holds you, ANSI Z133 calls for self-closing, self-locking connectors that take at least two deliberate actions to open, with a minimum breaking strength of 5,000 lbf (about 22.2 kN). In practice that means an auto-locking carabiner, usually a triple-action design, rated for climbing.

Non-locking and screw gate carabiners still have a place, just not as life support in a climbing line. They hang hand saws, water bottles, throw line bags and spare slings off your saddle. Keep the two jobs separate and mark or color-code them if it helps your crew.

Shapes and what they do

Oval carabiners keep loads centered and work well with pulleys and rope wrenches. D and offset-D shapes put the load near the spine, where the carabiner is strongest, and give a wider gate opening. A pearabiner, or HMS shape, has a wide end that suits hitches and bulky connections such as a rope bridge.

Steel carabiners are heavier but handle wear from rope and hardware better, which makes them a good fit for rigging and high-wear points. Aluminum carabiners are lighter and are what most climbers carry on the saddle. Captive-eye or bar designs keep a carabiner oriented on a rope wrench or device.

Gate design matters too. Keylock noses avoid snagging on rope and slings. Wide gate openings make it easier to clip thick rope or a saddle bridge. Some carabiners have a captive bar or clip that holds a device or pulley in the correct orientation and prevents cross-loading.

Other climbing hardware

Beyond carabiners, this section carries quick links and shackles for semi-permanent connections, connectors like the Notch Quickie for fast tie-ins, snap hooks for lanyards, and saddle storage hooks and clips. A good saddle storage setup keeps your carabiners, saws and slings in the same place every climb, which saves time and reduces dropped gear.

When you pick hardware, think about gate opening, gloved operation and whether a connector will stay oriented under load. Cross-loading, where the gate takes force, can drastically reduce strength.

Climbers often ask how many carabiners they need. A practical starting point is two or three auto-locking carabiners for your climbing system and lanyard, a spare locker for rescue or changes, and four to six non-locking or gear carabiners for tools and slings. Add more as your system grows.

Inspection and retirement

Check every carabiner before use. The gate should close and lock on its own every time. Look for grooves worn by rope, sharp edges, cracks, corrosion or any distortion. Retire any connector that has been dropped onto a hard surface from height, shock loaded or that fails to lock fully. Follow the manufacturer's instructions for each model.

Keep a few spare lockers in your kit. A gate that sticks with sap or grit at the top of a tree is not something you want to discover without a backup.