Abstract: An improved lock is provided for hinged glass doors which can be attached to the doors without the need for attachment screws and the like. The lock includes a pair of coacting casings which include suction-type securing means for attaching the casings to the respective doors. The first casing comprises a single piece integral metal housing which is open on one side and includes a locking mechanism, having an associated lock bolt, which is disposed in and occupies approximately one-half of the housing, the other half being empty. The second casing member comprises a base portion which is similar to the first housing and includes, in addition, an "upper" or overlying portion which extends parallel to the base portion and is affixed thereto by an upstanding wall located in approximately the middle of the base portion.