Petzl Am’D Ball Lock Auto Locking Aluminum Carabiner. Asymmetrical locking carabiner * Specially adapted for attaching equipment (rope clamps, etc.) * For use at the end of a lanyard * Excellent strength-to-weight ratio * Keylock system helps prevent snagging of the carabiner during maneuvers Tensile: 6272 lbs.Length: 4.25″Width: 2.50″Gate opening: .875″ 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.**