Features: 
Holds 18 28mm or shorter bits (+1 with screw driver), design with 3mm holes at bottom to slot-in magnets if bit become too loosen. 
Hole to charge screwdriver when case is closed
Hold 1 extended shaft
Multiple slots to add magnet sheet to hold screws when working

Add steps file so you can decide on what you want to change.
Printed with PETG, .2mm 25% adapted cubic and zero supports, hinge need some 1.75 filaments