FresKaro 4inches 25kN-5621lbs Climbing Carabiners, UIAA CE Certified, Twist Auto Locking, Made of 7075 Aluminium, Lightweight, Rust Proof, for Mountaineering, Rappelling etc., Multi-ColorsQUICK LOCK Instantly lock, and one hand to open, two way locking, a simple twist of the barrel and push against the spring load will unlock, Automatic re locking when you release the pressure UIAA CERTIFIED Major axis strength 25kN 5,621lbs, Cross loaded at 7kN, robust and heavy duty, rated for rocking climbing, hiking, rappelling, rescue, locking big adult dogs etc THE GENERATION 3 Gen. 3 the lock size is bigger, lock sleeve covers the carabiner nose