Built to last. the IGT Height Adjusters allow for integration of different table heights. Set your cooking space to a standing height. then dining while seated. To use the IGT Height Adjuster. slide into the edge of the IGT Frame. then attach the next table at preferred height and tighten the knobs to secure. Pair the IGT Height Adjusters with the IGT Three Unit Frame or the Renewed Bamboo IGT Table Long.