Brand new Cast aluminum body with a powder coat finish, hardened steel raceway sleeve, solid construction, wear-resisting and durable Each leveling castor bear weight 250kg, 4 castors hold up to 500kg Leveling castors are 360° rotatable, top plate is designed with bearing balls to support flexible movement and rotation By raising or lowering the anti-vibration foot you can make your machine or workbench completely stationary on uneven floor, or move it round easily when you need Great for workbench, heavy machine equipment, kitchen island, welding table and other industrial applications