Climbing aluminum alloy Made from high-strength 7075 aluminium alloy with forged construction. Wide, rounded body allows HMS (Italian Hitch / Munter Hitch) operations. Keylock hookless nose design for easy clipping and unclipping. Deep-groove screw gate design is easy to turn. Laser-etched warning mark on the gate for easy checking of gate status. Each carabiner is independently tensile tested to ensure safety. The Onsight HMS is a robust, durable large screw-gate carabiner for connecting ropes, harnesses, and protection points; carrying equipment. Suitable for all types of climbing, rescue, high-altitude work, and expansion projects. Major Axis Strength: 25kN Minor Axis Strength: 9kN Open Gate Strength: 8kN Gate Opening: 23mm Weight: 78.5g Certifications: CE0194 EN12275 UIAA121 GB/T 23469-2009