A Rotor protector for Estes Proto X Quadcopter. I created this after losing a few rotor blades. It is very light weight and the Proto X seems to handle it pretty well. There is a slight power and flight time lose, but thats to be expected. Still gets me around 4 mins of flight time. Enjoy Note: The two parts will need Glued together, Standard Super glue should work for this. I used 3M CA8 Adhesive. It fits very tight around the shell so be-careful not to break your Proto X when installing it.