Height meter

thingiverse

Simple circular saw blade height measurer or milling machine, you'll need four M4 self-locking nuts and their corresponding M4 16 mm Allen screws. I've used a 15-centimeter steel ruler commonly found in Chinese stores, which measures 19 millimeters wide. To use it effectively, cut the ruler to 15 centimeters and turn it upside down so that the starting point is at the top.