Do they make a a buzzing sound when they're spinning? If so, you need our patented Blade Clips! Only $19.95.
From the makers of Chip Clips. And Hair Clips. And Paper Clips.
Bonus points if you can work in it this way. ~Not-So-Handy Andy
Apropos of the previous post, maybe he too is expecting a flood and invested in a propeller conversion kit.