This is a dice box, tower, and tray combo. It has a drawer for fitting 7 different types of dice (d4 d6, d8, d10, d10, d12, and d20) in a standard set.

There are several holes for 8x1mm magnets, which facilitate keeping the drawer closed fully, as well as keeping the tower together when in use. See magnet direction pictures for polarity of magnets. Pick a direction on the magnets to call south or north, then keep it consistent.