Abstract: A locking apparatus for selectively securing a lid to a box having one or more posts depending from the lid and engageable in mating vertical bores formed in the walls of the box, elongated locking members mounted for both axial and rotational adjustment in bores formed the walls of the box in perpendicularly partially intersecting relation to the vertical bores, each post having a notch registerable with the associatd locking member and each of the locking members having a notch registerable with associated the post when placed in a predetermined rotational and axial position so that the post is prevented by the locking member from being withdrawn from its vertical bore except when the notch in the locking member is in axial and rotational registration with the post, the rotational and axial positioning of the locking member being accomplished by manually engageable knobs projecting from the box, and each locking member having spring detents for holding same in the desired rotational and axial position.