Solve your wobbly table problems with Table Shox glides. These automatic, hydraulic table glides self-adjust every time a table moves. Perfect for indoor or outdoor use.Model #: 121-1147 FMP Model #: 121-1147 Automatic, hydraulic, self adjusting Patented swivel for increased stability Won't scratch floors Can be use indoor or outdoor 1/4-20" thread 1-1/2" base diameter Adjusts 5-5/16" on any uneven surface 18 to 400 lb load capacity per set of four Easy installation Screw Diameter: 1/4" Width: 1.65" Height: 1.55" Pack of 4 Shipping Weight: 0.41 lbs 120307