As we all know, the wheel is a general term of address, which includes activities and fixed casters. The active wheel is also the universal wheel that we often say, its architecture can rotate 360 degrees. A structure that has no rotation of a fixed wheel, and cannot be rotated. Basically, two kinds of casters are usually used together, for example, the structure of the cart is the front two fixed wheels, and the two movable universal wheels close to the handrails are behind them.       

     To explore the history of casters, caster history is a very difficult thing, but after people invented the wheel, handling and transfer object becomes more simple, but the wheel can only be run in a straight line, for handling major object of change of direction is still very difficult, the invention with steering architecture the wheel is what we now call the casters or wheels. The invention of castor has brought great convenience to your transportation, especially mobile things. It not only can handle easily, but also can move in any direction, which greatly improves efficiency.