Abstract: A locking plate system comprising a locking plate assembly and proprietary wrench is disclosed. In a first embodiment, the locking plate assembly is installed either singularly or in sets on a rigid panel (rectangular or L-shaped) and used to secure the panel to an elevator wall or door jam. In addition, rivets are used to secure the locking plate assembly, The locking plate assembly utilizes a jack post and a latch dog, each having teeth that are manipulated to lock and unlock the system. The respective angles of the interfacing teeth on both the jack post and latch dog provide the unique capability of the locking system to effectuate both the functional compressive strength of the locking plate and the ability of the mechanism to retain its locking functionality. In other embodiments, the rigid panels are included in the embodiment, with specific description given for the composition of the panels.