This is a set of casters for medical equipment. They are equipped with Colson's original double pedal structure, which makes the process of braking, locking and unlocking effortless. The front caster can lock the current direction to ensure long-distance straight-line alignment, and the rear caster model is used to lock the direction and movement. This product is also excellent in silence, shock absorption, anti-skid and cushioning, providing medical staff and patients with a safe, stable and convenient user experience.