This heavy-duty locking carabiner ensures safety during extreme outdoor activities. It quickly and stably auto-locks during use, and even by rope friction, the latch won't open. Specification: Product name: Steel three-stage automatic lock, Material: Steel + Aluminum alloy, Opening: less than 2.2cm/0.87 inches, Weight: 192g, Scope of application: Mountaineering/caving/rock climbing/development/rescue/high-altitude operations/work protection/rappelling, etc. Note: 3000kg tensile steel + aluminum alloy material, automatic lock carabiner, Main shaft tension 30kN, feels heavy, The main lock has an anti-unlocking design, and the lock buckle will not be opened even if it is rubbed by the rope. Pack List: Climbing carabiner*1. Useful Auto-Locking Design: Our climbing carabiner is equipped with a three-stage auto-locking system that reduces the risk of accidental openings. Experience ultimate safety and assurance during your climbs. Reinforce Security: The anti-unlocking design of our climbing carabiner's main lock provides foolproof protection, preventing accidental release even under rope friction. Outdoor Gear: A must-have for aerial work, rescue operations, and engineering protection. Beyond mountaineering or rock climbing, it's an indispensable safety companion for outdoor adventures and professional work. Strong Load-Bearing Capacity: This robust carabiner keeps you secure while mountaineering, rock climbing, or cave exploring, with its ability to resist up to 3,000kg of tensile force. Wide Applications: Perfect for mountaineering, cave exploring, rock climbing, rescue, and working at height, this climbing carabiner ensures safety and reliability in all your vertical adventures.