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.Quick release propeller mounting plates for the DJI Phantom 4 Pro - Obsidian Edition ATTENTION:These parts are for the Phantom 4 Obsidian model ONLY! These parts will NOT fit for the Black ediion purchased from Bestbuy.