D-Shaped Locksafe Carabiner with ANSI Gate

This D-shaped Locksafe carabiner pairs DMM's Locksafe auto-locking gate with a gate built to ANSI gate-strength requirements. The D shape puts the load near the spine, where the carabiner is strongest.

Why an ANSI gate matters

Arborist systems load connectors in ways sport climbing does not, with gates pressed against stems, hardware and rope. A high-strength gate gives more margin if the gate itself is loaded. Check the markings on the carabiner to confirm the gate rating, and make sure it suits the standard your work requires.

A D shape is a good general choice for lanyard ends, saddle bridges and device connections. Locksafe gates lock automatically and take a deliberate twist-and-pull to open. See other auto-locking carabiners to compare shapes.

Keep connectors in your climbing system separate from rigging hardware. A carabiner that has been used to move wood may have taken loads or damage you cannot see, and it should not go back on your saddle.

Use and inspection

Load the carabiner along its spine, keep the gate closed and locked, and watch for cross-loading against other hardware. Before every climb, check that the gate closes and locks fully on its own, and look for grooves, sharp edges, cracks and corrosion. Retire it after a big fall or a drop onto a hard surface.

Life-support gear must meet the applicable standard, be used per the manufacturer's instructions and ANSI Z133, and be inspected before every climb. Get trained before you rely on it aloft.