EDELRID HMS Bulletproof Screw Slate Carabiner – Lightweight Belay with Steel Wear Plate

Overview

The Edelrid HMS Bulletproof Screw Slate is a solid, innovative carabiner designed for half-cabestan belays. A steel wear plate at the crown helps control friction where ropes contact hardware, reducing premature wear and keeping edges smooth for everyday use. Its sturdy aluminum body blends reliability with a surprisingly light touch, making it a practical choice for climbers who value comfort and consistency on belays.

Engineered with an H-profile, this carabiner makes efficient use of material without sacrificing strength. The result is a durable device that performs well under load while staying as light as possible. A single steel insert protects the rope path from rope friction and bolt hangers, which can wear down gear over time. Weighing in at 82 g, it sits comfortably in the palm and won’t weigh down your harness setup during long sessions or quick seconds on the wall.

Locking options and use cases

Choose between a Screw Gate or the Triple Lock variant to match your preferred locking style. The keylock system ensures smooth clipping and unclipping, helping to minimize awkward bounces or cross-loading during maneuvers on the rope. The HMS shape is optimized for belay use, and the design also offers a lighter alternative to traditional steel carabiners for lowering or basic hauling when weight matters and speed is helpful.

• Aluminum carabiner body with a steel wear plate and screw gate
• H-profile construction for efficient material use and minimal weight
• Steel insert prevents premature wear from rope friction or bolt hangers
• Weight: 82 g

Technical details support practical field use: a maximum vertical load of 25 kN, with a 9 kN opening and 9 kN cross-load. The 89 mm width and a 24 mm gate opening accommodate a range of rope diameters and hardware. The product is built to meet EN 12275 and EN 362 standards, using a combination of aluminum and steel to balance strength and durability across climbing sessions.

What you gain on the wall

Beyond raw specs, the Bulletproof Screw Slate offers a combination of confidence and ergonomics. The steel wear plate and wear-resistant insert help maintain a smooth rope path over time, while the locking options provide reliable security without sacrificing ease of use. For climbers who frequently switch between belay positions or want a lighter alternative to steel, this carabiner presents a practical, non-guaranteed improvement in handling and longevity under normal climbing conditions.