Learning how to operate different types of locks and closures is fun and convenient with this all-in-one activity. The box is made of sturdy beechwood and features ten little doors with nine different brass locks (one of the doors has no lock on it). The box measures 31 cm x 12 cm x 14 cm (about 12" x 5" x 5.5") and has a handle on top so it can safely be carried from a shelf to a work surface.