DGZZI Propeller Protector 1Set Red and White Propeller Blade Crash Guard Cover Bumper for DJI Phantom 3

I order these for my DJI phantom 3 drone. I will start off by saying they do fit. With that said, I would not use the screws as they are flimsy metal and the hex head will start to strip with the Allen wrench. I would go to the hardware store and buy some that are similar and better quality. There is no instructions with it. Also they include string and I have yet to figure out what it is supposed to do and why you need it, I wouldn't put it on because if it breaks it will end up in the propeller and cause damage.

As one who has crashed once of twice, I can testify to the need for there. they are fairly easy to install, although they sent two different length screws - took a minute to realize that. The guards will protect the props well, but they are not all that strong.