Rockless table base instantly stabilizes itself anytime moved to a new location, the table stand become adjusted to its new location instantly and automatically. No hydraulic or sensitive parts used in our table stands. The table bases we are offering are strong and rigid and last a lifetime. No longer need to worry about spilling drinks or discomfort of a rocking table while enjoying the dining experience. To know more about self level tables please visit our website. Website: http://rocklesstable.com/ Address: 92 Chandon, Laguna Niguel, CA 92677, USA Phone: 949-280-7949