Verilux Heavy Duty Aluminum Alloy D Lock Carabiner Auto Lock for Climbing Hammocks Tree Locking Carabiner  (Black)

OPTIMIZED D-SHAPE ENGINEERING: The 4.9x8.5cm D-profile maximizes internal gate clearance while minimizing bulk. This geometry distributes asymmetric loads efficiently across the spine, reducing gate leverage forces during complex rigging applications in tree surgery or multi-pitch climbing anchor systems.AEROSPACE-GRADE MATERIAL COMPOSITION: Constructed from forged 7075-T6 aluminum alloy with hard-anodized surface treatment, this carabiner achieves exceptional strength-to-weight performance. The corrosion-resistant finish withstands abrasive rock contact and environmental exposure without compromising tensile integrity.CERTIFIED HIGH-LOAD CAPACITY: Independently tested to withstand forces exceeding 1600KG (35KN), this carabiner meets rigorous safety standards for life-critical applications. The structural integrity ensures reliable performance under maximum dynamic loads encountered in professional climbing, arboriculture, or high-angle rescue scenarios.MULTI-DISCIPLINARY TECHNICAL APPLICATION: Validated for professional vertical disciplines including UIAA-compliant rock climbing (single pitch/lead), arborist canopy access, industrial rope access (IRATA/SPRAT), and expedition hammock rigging. The auto-lock system provides consistent security across dynamic load environments.AUTOMATIC TWIST-LOCK SECURITY: Incorporating a spring-assisted auto-locking gate with manual twist-sleeve engagement, this mechanism provides fail-safe closure. The triple-action disengagement sequence (twist-pull-open) prevents accidental opening during vibration or impact, essential for rock climbing lead protection or suspended work platforms.