Propeller Mounting Plates. Features: Offering easy, tool-free mounting and dismounting, the Propeller Mounting Plate is more reliable and durable than previous versions. A patented rotor lock mechanism uses springs for stronger elasticity. Package contains 1x Propeller Mounting Plate (CW) and 1x Propeller Mounting Plate (CCW). Designed for Phantom 4 Pro (Obsidian Edition) models.