Features: It can be stationary, also can rotate 360 Brake function: turn up LOCK, castor can be stationary, turn down FREE, the caster can rotate 360 degrees Zinc alloy material, delicate appearance, strong and durable Smooth push and pull without hurting the floor, excellent anti-seismic and anti-shake performance, no fear of special road surface The wheels Perfect for office and residential furniture in apartments or shared offices Powerful carrying capacity: Each rubber caster wheel can support up to 30KG. Specification: Material: Zinc alloy Steering: universal caster Threaded Connecton Rod: 8mm Specification: 2 inches Diameter: 51 (mm) Maximum load: 30 (kg) Scope of application: furniture, electrical appliances, office furniture or home or hardware products Color: black Package list: 4 x Swivel Castor Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.