and arranged to be installed on the keeper bars once the embodiment is properly installed on keeper bars and locked access to the container is prohibited an alternate embodiment may be permanently installed on the interior of the container such as the doors or similar enclosure fig1 shows a preferred embodiment of the invention when fully assembled front cover assembly 2 back plate assembly 4 and locking bar assembly 6 are the three major sub assemblies involved the locking bar 6 which may be a j shaped bar or referred to as a j bar is inserted by slidable engagement with the lock and retained in the lock that is present within the back plate assembly a j bar assist handle 7 may be attached to the j bar to ease j bar operation user interface 8 is present on the housing the back plate of this embodiment has a u shaped member 10 or u bar that is opposite the j bar fig2 shows an alternate embodiment of the invention that includes all of the elements of the embodiment of fig1 this embodiment further includes a keypad user interface 12 which may be used to enter an access code to unlock the device fig3 shows a rear isometric view of an embodiment of the invention when fully assembled the u bar 10 which may be formed as an extension of the back plate 4 is installed on one keeper bar of the container the sliding j bar 6 is installed on the other keeper bar the j bar may be positioned as required to ensure a snug fit between the device and the keeper bars fig6 fig4 shows a top view of an embodiment of the device with the front cover assembly removed mounting.