The Mecanum wheel is one design for a wheel which can move a vehicle in any direction. It is a conventional wheel with a series of rollers attached to its circumference. These rollers each have an axis of rotation at 45° to the plane of the wheel and at 45° to a line through the center of the roller parallel to the axis of rotation of the wheel.
For more details about this kit, please refer to wiki
Omnidirectional transfer ability
For any technical support or suggestion, please kindly go to our forum.