The concept of da x caster is to smoothly harmonize with the design of furniture or fittings, while maintaining a distinct presence as a caster. Rather than a ball bearing configuration comprising an axle and bearing, which is the basic structure of a conventional caster, it is characterized by a sliding configuration that does not use an axle or bearing. The da x caster structure comprises a hot-press molded body frame made of CFRP, and an internal ring made of special resin, enabling a ring-shaped wheel with a central hole – a hubless caster that possesses sufficient strength but appearing slim, yet seems to float.