The cool propeller mounting adapter: Quick Detach.
-Easy to mount/remove the propeller
-Easy to carry/store your multicopter
Your purchase includes:
-1x CW Quick Detach(Golden)
-1x CCW Quick Detach(Titanium)
-8x M3x8 screws
Please beware that only using quick detach with the same direction on co-axial copter.
Foxtech Quick Detach review by Stephen Cinch: