Material: This ring is forged from high-strength metal material, making it difficult to break, wearable, and safe and reliable to use. Applications: Suitable for rock climbing, mountaineering, caving, logging, sailing, window cleaning, aerial games, rescue, raids, engineering protection, aerial work, and more. Stay Safe: Using the friction between the rope and the descent speed or brake allows for safe climbing. Compatible Ropes: 8-13mm. The surface is anodized to maximize the prevention of rope and device abrasion during work, preventing rope damage and protecting fingers from burns. Usage Conditions: Primarily used for high-altitude descents and rappelling, and can also be used for descents with belay devices, caving, rappelling, general climbing, and rescue in various fields. Tension: 35KN (approx. 3500kg) Item Type: Climbing Descender Size: Approx. 14.6 × 7.5 × 1.2cm / 5.7 × 2.9 × 0.5 inches Hole Diameter (Inside): Approx. Small - 2.7cm / 1 inch; Large - 5.1cm / 2 inches Suitable for hole diameters: 8-13mm / 0.3-0.5 inches Weight: 120g 35KN Rescue Eight Rock Climbing Mountaineering Accessories High Strength Extremely Strong and Safe Durability Aerial Work Rappelling Easy Operation Climbing Gear Carabiner New Version Rock Carabiner 25KN (2500kg) D-Ring Sling CE Certified Ultra-Lightweight 63g Rescue Training Push-up Rope Handle Outdoor Hammock Camping Tarp Pack Hook Multi-functional Lock Towing Prevention of Falling Carabiner 25KN (2500kg) D-Ring Sling CE Certified Ultra-Lightweight 63g Rescue Training Push-up Rope Handle Outdoor Hammock Camping Tarp Pack Hook Multi-functional Lock Towing Prevention of Falling Size: FREE SIZE