Whether to turn
It is divided into directional casters and non directional casters (i.e. universal casters).
The directional casters have no rotating structure and cannot rotate; The structure of universal casters allows 360 degrees of rotation.
Caster subdivision
Super heavy casters, extra heavy casters, special-shaped casters and brake casters, shock absorption casters, adjustable casters and light casters, medium casters, heavy casters, etc.