Square Plumb Level

It is more compatible for education material or basic measuring tool rather than a sensitive measuring tool. It must be bigger, heavier and well slided parts needed for better accuracy. However you can measure gravity direction, 90 degree angle and level for most of the basic tasks. For a heavier plumb bob you can print the plumb with 22 mm steel ball holder and you can put a 22 mm steel ball on it. Or you can make the plumb with %100 infill ratio.