This is a latching box made for a 13 piece set of hex shank drill bits. I specifically used the 13 piece ToolShop brand (From Menards) since the original packaging is simply cardboard and plastic. This box protects your drill bits from being damaged and dulled. I used PETG as it gave me the best results. The hinges use M4 hardware and that locking latch uses filament for its hinge. 

Recommended material: PETG

Required hardware: 2x M4*20 screws/bolts

                                     2x M4 Nuts

                                     2x M4 Washers (optional)

Assembly:

1. Insert the bolts into the hinges and then put a washer (optional) and nut on the other end. (Using Loctite to prevent the nuts from backing off is recommended). 

2. Use a piece of filament for the hinge of the locking latch. If experiencing difficulty pushing filament all the way through, you can also use two pieces of filament and just push them in from both ends of the latch

3. The insert that goes inside the box has 2 cylindrical nubs on opposite ends. Please note that one nub is fixed in place and the other one can bend. The fixed nub is meant to be inserted on the side of the box with the latch and the flexible nub is meant to be on the hinge side. When installing the insert to prevent the nub from breaking, insert the fixed nub into the hole that is on the latch side of the box first. Then you can slowly and carefully push the flexible nub down into its hole.

If you like this model please boost it since it would help me out a lot!