The new and improved ruler! This edition uses stainless steel dowel pins to minimize gaps and wiggles in the hinge. The ruler prints in halves, so A1 mini users can now print this! Be aware; this requires some non-3D printed hardware and needs to be assembled. 

Assembly:

Step 1: Print and gather all of the required parts:

Step 2: Insert the pins into the hinge:

Step 3: Bend the hinge and insert it into the main bodies and screw it in.

Step 4: Adjust the screws to adjust the tightness of the hinge. That is all! Enjoy using the ruler for all of your measuring needs! Optional: insert round magnets into the bottom cutouts!