An expandable drawer divider includes a first panel, a second panel and a lock mechanism. The second panel is slidably connected to the first panel. The locking mechanism includes a lever and a lock member operably connected to the lever. The lever is configured to pivot about a pivot axis oriented perpendicular to a longitudinal axis of the divider toward a first position wherein the lock member is moved in a direction parallel to the longitudinal axis into engagement with the second panel and pivot toward a second position wherein the lock member is disengaged from the second panel and the second panel is movable relative to the first panel.