Summary This design is from DANILO COVA from Como (Italy), one of the great Makers of our Community. He found the way not to trow away his used spools from FILOALFA - 3D filaments Italian producer - and re use them as desk organizer to store screws, bolts, small parts. This simple and creative idea is so good that we decided to share it with you. Maybe you don't use this producer's filaments, but you can easily modify the design to fit the kind of spool you usually buy. Use some self-tapping screw to mount the drawers inside the spool. IMPORTANT: you don't need to make holes in the spools, simply use the pre-existing holes near to the edge to insert the screws. All the best!