Caster Wheel! Family, who knows!

Casters are a general term, including movable and fixed casters. Movable casters are what we call universal wheels, and their structure allows 360-degree rotation; fixed casters have no rotating structure and cannot rotate. Usually two kinds of casters are usually used together. For example, the structure of a trolley has two fixed wheels at the front and two movable universal wheels at the back near the push armrest. Casters It is also very difficult to trace the history of casters. However, after people invented the wheel, it became much easier to carry and move objects. However, the wheels can only run in a straight line, which changes the direction when carrying heavy objects. It was still very difficult. Later, people discovered the caster as a transportation tool, which can reduce the transportation pressure and move forward quickly.