A simple solution to retain and prevent loss of the antenna retention pin for the Autel Evo RC controller. In addition to helping retain the pin for the antennas these additions also help reinforce the weak and sometimes brittle antennas. Each set comes with a Left & Right retainer. Slides over the end of the antenna and press fit at the base of the antennas for an easy install. Take care when pressing the hinge pin protector into position. Hold the antenna firmly with a steady hand while preventing any flexing or twisting where the antenna and pin swivel. Antenna pin protectors are each marked R & L. When installing make sure the R & L are facing up where they both can be read while looking down on the RC controller. Press firmly as the protector is installed and pressed all the way down the antenna to it’s base.