The DJI Phantom Self-Tightening Propellers are a set of two 9" propellers compatible with the DJI Phantom 2 Quadcopter. Both propellers are rotating props while one is clockwise (CW) and the other is counter-clockwise (CCW). These DJI style Self-Tighening Propellers are specially designed to be used with the DJI Phantom 2. They have built-in threads to allow self tightening while in flight and require a special spanner to tighten before flight. The self-tightening design avoids prop becoming loose during flight.
These props will only work with the right and left handed threaded motors.