Pick up the DJI Phantom 2 Vision Self-Tightening Propellers for increased stability and flight reliability from your quadcopter. Two propellers are included ? one clockwise, one anti-clockwise ? which feature built-in threads for self-tightening whilst in flight. These threads ensure the correct propeller is mounted to the correct DJI Phantom 2 Vision motor at all times. Pick up your DJI Phantom 2 Vision Self-Tightening Propellers now?