Petzl William Ball Lock Auto Locking Aluminum Carabiner. Large size locking carabiner * Large size and opening to allow anchoring of several ropes and slings * Wide pear shape facilitates belaying with a Munter hitch * Keylock system helps prevent snagging of the carabiner during maneuvers. Tensile: 5600 lbs.Length: 4.50″Width: 3.00″Gate opening: 1.00″ Lock Type: *Double Auto * requires two actions to prepare to open gate and gate will automatically lock upon release. **Alway double check lock and gate closure before using.**