One Button Pneumatic LiftingAdvanced pneumatic spring system moves the desk top from 30" to 45.7" in few seconds. | Premium Materials Desk TopWe select high quality materials to ensure the desk top solid and sturdy enough. | 12mm Universal Wheels with LockThere are 2 lockable wheels among the 4 wheels. They can be locked easily to help stop the table. | Sturdy Metal Desk FrameThe steel frame makes our mobile laptop desk stronger to ensure it stable and safe. |