APPLICATION: Our product Propeller Guard is specially designed for DJI Mavic Pro, it is not suitable for other devices. It aims to protect your propellers; FUNCTIONS: Protect your props when your device hits trees, walls or other obstacles. Also can avoid people hurting by the props. Not Affect Obstacle Avoidance; EXCELLENT DESIGN: Made of PC plastic, injection molded and Triangle Structure. Guards outer radius is bigger than propeller max radius, provides better protections for propellers; PLEASE NOTE: The 4 propeller guards are the same, but you need to pay more attention to the buckles marked with1, 2, 3, 4, and make them match the corresponding landing gears.