2win2buy 30KN Rock Climbing Carabiner, D-Shaped Auto Locking Carabiner Twist Lock Hot-Forged Magnalium Climber Hiking/Travel/Mountaineer Karabiner Outdoor Sport Tools Auto-Locking Carabiners features an auto-locking, 1" gate opening,. All you do is twist the gate to open. Release the gate and it automatically closes and locks. High strength in a compact design; Rugged forged alloy steel construction Allowing for single hand operations while working in mission critical environments Application:exploring, rappelling, rescue, engineering protection, aerial work CE certified. Strength: Closed : 30 kN; Dimensions (L x W): Approx. 2.95*4.4 Inch