A cabinet includes spaces for a number of electronic enclosures, each of which has a free end from which a pair of levers extend upward and downward to teeth engaging slots within the cabinet, aiding in the insertion and removal of the enclosures from the cabinet. An electronic enclosure that is wider than a standard width includes additional teeth on crank plates turning with the levers. The electronic enclosure may include an electrically-operated interlock mechanism preventing the insertion or removal of the electronic enclosure by preventing movement of a shaft attached to either or both of the levers.