The compass is housed in a cylindrical cardboard case. There are the following steel accessories: two straight pointed rods for recording measurements (dividers), two curved rods for measuring diameters (spherical compass), tweezers, a pencil holder, a paper-cutter, and a small toothed wheel to perforate paper for pouncing. The accessories were attached to the molded brass legs by means of steel clamps. A note in the case stated that the instrument belonged to Michelangelo Buonarroti.