The Edelrid HMS Bulletproof Screw FG biner is both innovative and durable, featuring a steel insert at the apex and an internal spring bar to prevent twisting. It's specifically designed for use with belay devices. Keylock closure mechanism ensures smooth clipping and unclipping Spring bar prevents cross-loading during belaying H-profile construction maximizes material use and minimizes weight Steel insert prevents premature wear from rope friction or bolt hangers Technical Features Gate opening: 24 mm Force max. major axis: 25 kN Force max. minor axis: 9 kN Fmax. open: 9 kN Closure: Screw gate Carabiner shape: HMS Certifications: EN 12275, EN 362 Dimensions Width: 89 mm Length: 110 mm Material Aluminium, steel