My main pencil case goes with me to most workplaces. It contains:

• 6 pens (3 Pilot Frixion Clickers and 3 cheap 0.7 mm pens)
• 5 mechanical pencils (3 Staedtler 925-15 and 2 Staedtler 925)
• 1 eraser
• 2 full metal rulers
• 1 protractor
• 1 Casio FX-82AU Plus II calculator For the build, I used TPU for the seal, with all other components printed in PLA. I used 1.7 mm steel wire for the hinge pivots; however, standard filament could work as well. Tolerances will need to be checked if using filament in place of steel wire.