Surgical end effectors (1100) are disclosed. The surgical end effectors can include a first jaw (1102) and a second jaw (1130) comprising a closure surface (1140) and an opening surface (1142). The surgical end effectors can also include a pivot joint (1150), wherein the second jaw is configured to pivot relative to the first jaw at the pivot joint, wherein the closure surface is positioned distal of the pivot joint, and the opening surface is positioned proximal to the pivot joint. The surgical end effectors can also include a firing member (1760) configured to move distally during a firing stroke, wherein the firing member comprises a first flange (1764) and a second flange (1762). The second flange can be configured to engage the closure surface to pivot the second jaw toward a closed position, and the second flange can be configured to engage the opening surface to pivot the second jaw toward an open position.
