A set of 6 boxes for drill bits ranging 0.3 ÷ 4.2mm (that's what my mini drill can fit in it's 0.3-4mm chuck). Fits standard length drill bits. Compartments every 0.1 mm. Lids have embossed labels (sizes). Boxes are of similar size, largest is 7×9cm This design uses a length of 1.75mm filament as the rod for hinges. Lids are kept in place by latch-like mechanism.

This design is fully customizable - take a look at any wrtblox_*.scad (that contain customizable parameters and include base.scad that does the dirty job).