this force the pyramid is first tipped up side down step 11 thus applying a force f e that preserves the locations of all the pins and then tipped as shown in step 12 finally the pyramid may be uprighted as shown in step 13 this applies a force f g which moves locking rod 58 39 back to the bottom of its channel 58 thus unlocking the bottom portion of the drawer 52 the upper portion remains unlocked because locking pin 56 39 is blocked from falling into its locking position by blocking pin 60 39 the location of all the pins is now as shown in fig4 a 4b and 4c and the drawer may be pulled or extended from the pyramid as shown in fig2 to lock the drawer all that need be done is to close the drawer tilt the pyramid back as in step 4 of fig5 so that a force f cd will move blocking rod 60 39 back to the rear of its tunnel thereby allowing locking pin 56 39 to fall back into its locking position when the pyramid is uprighted fig6 depicts a perspective view of a different embodiment of the present invention used to lock a pair of plug and receptacle type objects together in fig6 the objects are shown as cylindrical in shape but any geometrical shape could be used a first object 70 is adapted to interface with a second object 72 the first object 70 includes at least one large finger like extension 74 that is inserted into a corresponding cavity section 76 of the second object 72 a keying flange 78 and corresponding keying grove 80 are.