Model: SM33 has 3 folding leaves stored in table base. By turning the turntable under the table top the 3 leaves move synchronously to a position that makes room for the extension leaves in the base (table size increases to 1490mm) When light pressure is applied the extension leaves unfold by means of a spring placed under the triangle in the middle of the table. Priced in oak lacquer but is available in other finishes at varying prices.