For who are just starting to learn to operate and need protections to avoid damage to the aircraft For who want to protect their and minimize the damage caused by accidental collisions The back protections plate is designed for AVATA 2 propellers to protect the quadcopters from damage by crashes and drop Lghtweight it doesnot increase the burden of the aircraft, and at the same time with excellent durability, prolonging its service life Allows the quadcopters to automatically regain its balanced in event of collisions improving the stability of the aircraft