These leg levelers range in length from 2-4 inches and features 3/8-inch base diameter.  These are compatible with the LL-158 U brackets and K-75 corner brackets.  Adjustable furniture glides, features a wide heavy base, stops wobbling on uneven floor and reduces vibration. It is made of tough steel. Good quality for adjusting furniture height, could adjust each leg individually and be used for a long time. It could be used for tables, chairs, shelving units, kitchen cabinets, workbenches, plant stands, etc.