The Petzl AM'D ball lock carabiner is a pear shaped carabiner with a large gate opening. It is excellent for connecting devices to a harness or at the end of a lanyard. Its shape resists cross loading well. Asymmetric shape for an exceptional strength to weight ratio. When loaded, the carabiner is oriented in the optimal working axis. Keylock System for snag free body gate interface. Ball lock system automatically locks the gate, and requires a button to be pressed and the sleeve to be turned to unlock.