Website: thingiverse
Author: MechEngineerMike
Price: Free Download
File format: .Stl 3d printable
Description:
***Buy it fully assembled & tested here! https://etsy.me/2U6v6ekThe ‘Geneva Roller Ruler’ is a special pocket sized tool for measuring any line, any curve, any length! With this device you can measure square objects, round objects, straight lines, curved surfaces, you get the idea!**Additional Instructions & Photos here