This pair of ultra lightweight wheels and tough carbon fibre axle have been specially designed for the Parrot MiniDrone Rolling Spider.The wheels are moulded from flexible plastic to optimise performance and minimise power consumption.The wheels are simply pushed onto the axle, that may be conveniently clipped onto the Rolling Spider, to roll around the floor, climb walls, and cross the ceiling as desired.In case of difficulty, please see the Parrot website for further details.