Separating the propeller from the outside to the propeller from cutting into people and objects This package provides a simple and fast installation process, allowing for easy installation of propeller protective rings for MINI3 / 3PRO without the need for additional tools Avoiding foreign objects from hitting the propeller at the same-time, enhancing flight The propeller protective rings package adopts a lightweight design, which can minimize the additional weight on the aircraft and that flight Using high toughness, resistant to and pressure, reducing accidental damage to the machine