This is a simple mount for a dial indicator to slide in the slots on a table saw. This lets you adjust your blade. 

This was designed for a Craftsman 118 table saw from the 60s. It has 3/4in (19mm) slots.

The stl should be oriented correctly to print with no supports.

I used a cheap dial indicator from WEN:  https://www.amazon.com/dp/B07HFV25M9

Here's the Video from Stumpy Nubs on YouTube that I followed: