X-4PZ… Pair of Slide Out Pull Up Refectory Table Lifts for Table Leaf Storage. Table End Extender for 11″ extension. Pair set will accommodate one leaf for each end of one table. Telescopic table extender brings extension out from under the table top and automatically locks them up into place on a spring activated pop-up mechanism. Adjustable, Easy to Install, All Steel, Anti-Rust Plated. Minimum length of fixed tops is 31-1/2″ for tops 3/4″-1″ thick.