These propellers are garbage at first, they don't turn white. Second, it's just cheap plastic that can snap faster than a branch. Third, the propellers are bent forward or backward. Fourth, with these propellers, the GoPro's hover mode is good. but not with these propellers. I tried this because I was testing it and when I started to hover it was moving at 3mph kind of forward to the left and when I stopped to save to my phone it was in "hover" mode " it crashed straight into a tree 10 feet away from me, snapping my GoPro Karma wallets and all 4 of my propellers. Morel stories buy the regular ones and you're safer than sorry. I would also like a refund