Anyone that has an Eachine 250 quad racer has probably had the same problem as I have trying to pry the lens cap off. The way the lens is flush mounted makes it a challenge. Then what do you do with it once you get it off. I usually put the cap down somewhere and then can't remember where I put it. Here's a solution that I came up with for mine. This lens cap has a handle that you can grab to pull it off and put it back on and it also has a hole in it for a string or tie wrap to secure it to the quad frame. I print mine up in a bright color so you always know if the lens cap is on or not. The handle can also be printed by itself and glued to the existing lens cap for the same effect. Anyway, simple fix. I hope you find it useful.