This gauge tests your 3D Printers ability to resolve small clearances between parts. It is a valuable tool for determining what you need to use in your designs to create moving parts without them fusing together.

It features rotational gaps from 0.12mm to 0.3mm and threaded gaps from 0.25 to 0.35mm.

For the rotational knob of 0.12mm clearance, you are required to use a little bit of force to make it rotate, same to the threaded bolt of 0.25mm clearance, force will need to be applied to turn for the first time.