HEAVY DUTY LOCKING CLIMBING CARABINER AUTO-LOCKING CARABINERS FOR DAILY USE-INDOOR AND OUTDOOR Two-steps (twist and push) to open, automatically lock when releasing.Auto-locking is easier and quicker to lock, especially when you use it in cold weather or in a hurry; it helps a lot.As an outdoor sports enthusiast, it is essential to have safe and high-strength accessories--caribeener clips.And our climbing carabiner is worth buying---Safety, Strength, Stability. CARABINER HEAVY DUTY Material: High strength alloy steelMaximum Tension: 25KN(5600LBS)Dimensions(L*W): About 4.33inch*2.36inch(Opening 0.71inch) Certification System: F1774 CEShape: O-shaped steel carabinerWeight: 166g/0.366ib Climbing Carabiner Backpack and Camping Carabiners Hanging Hammock Chair