‧Self Leveling Table Base Glide ‧1/4″ #20 thread ‧Indoor or Outdoor use. Up to 100 lb weight load per glide ‧Steel, polyurethane and non-skid ‧Impact Resistant ‧Fits most standard table bases ‧Shock automatically adjust 5/16″ on any uneven surface ‧Hydraulic shock that eliminates table wobble