BLACK DIAMOND Gridlock Screwgate locking carabiner — Grey/Red belay-loop isolation, keylock nose

The BLACK DIAMOND Gridlock Screwgate is a hot-forged aluminium locking carabiner engineered to keep your belay loop isolated and your system clipped smoothly and securely.

Designed for climbers who want a dependable, low-profile locker for belays, anchors and rappels, the Gridlock Screwgate pairs a distinct belay-loop isolation shape with a manual screw closure and a keylock nose. It balances durability and lightness for frequent gym sessions, sport routes and multi-pitch climbs while reducing snags and unwanted cross-loading in critical configurations.

How does the Gridlock shape improve belay safety?

The Gridlock silhouette separates the belay loop from the carabiner spine so webbing and loops stay where they belong during belays and anchor building. That geometry helps keep forces aligned on the major axis and reduces the chance of awkward cross-loading under load. It’s a simple design change with an immediate effect on handling and reliability.

• Belay-loop isolation prevents side loading during lowerings and locking off.
• Keeps belay device and rope positioned for cleaner rope management.
• Minimizes accidental contact with the spine when building anchors.

Why choose a screwgate locking mechanism for climbing?

Manual screwgate closures give you direct tactile control over locking: you can visually and physically confirm the gate is secured. They’re straightforward to operate, require no tooling, and remain highly dependable in a wide range of conditions. For belays, guides, or instructors who prefer familiarity and redundancy, screwgates are a solid choice.

• Simple hand-operated locking for quick visual verification.
• Durable threads designed for repeated use in gyms and crags.
• Less likely to shift open unintentionally compared with non-lockers.

What features reduce snagging and make clipping easier?

The keylock-style nose eliminates the notch that often catches slings, harness gear loops or belay devices, which smooths clipping and unclipping. Combined with the Gridlock profile, you get fewer fumbled moments when setting up or cleaning anchors. The gate action and rounded edges also help ropes run cleanly during lowers and rappels.

• Keylock nose for snag-free clipping and unclipping.
• Rounded gate and entry for fluid rope movement and fewer catches.
• Compact, ergonomic shape for confident one-handed operation.

Who is this for? The BLACK DIAMOND Gridlock Screwgate suits climbers who want a trustworthy, everyday locking carabiner focused on belay performance. It’s ideal for top-rope belayers, sport climbers, multi-pitch leaders, climbing instructors and guide services that prioritize clean rope handling, predictable locking action and light, robust hardware. If you need a locker that reduces cross-load risk, clips smoothly and withstands frequent use, the Gridlock Screwgate is built for those demands.