Blade Guard for Parrot mini-drone

The mini-drone I have is a taken from a Parrot Hydrofoil. I think the guard shall work for Parrot min-drones as well or some other mini drones with motor O.D. 8.5mm. 

The guards are designed to be clamped on the motors directly. The guard O.D. is 77mm to protect the blade which has diameter of 70mm. The bottom of the guard is sloped to in the same angle of the motor housings of the Parrot drone, that is used to help the guard to stay at the desired position.