20 Inch Folding Ruler

I started out to design a folding Metre Stick, to replace one I have had for years. When my wife saw the initial design (not finished yet) she asked for an Imperial measure ruler for baking.This is the result of that. I will eventually finish the metere stick and post. The Ruler requires a 3m x 16mm hex head machine screw for the hinge.The optional storage box uses a length of 1.75mm filament glued at one end as a hinge.