Gaui 3 Leaf Foldable Propeller (Ccw) Holder (2 Pcs) for Gaui 9443 Folding Props for DJI Phantom, Phantom 2, Vision, Vision+ STO Metal Foldable Propeller Holder, applicable for DJI Phantom, Phantom 2, Phantom 2 vision, 450, and F550 modification. Foldable designed for easier carry. Unique 3-leaf design, which can increase flight time and efficiency. While crushed during flight, the propellers would fold and decrease damage effectively. With built-in self-tightening thread, easy to assemble and disassemble.