This is a knob to adjust the blade height on the used ryobi table saw I bought which was missing this knob. I intended to use the screw hole, but this ended up being a pressure fit for me, which works and I'm happy with. I used a rubber mallet to get it on snug. You may want to increase the tolerances and use the screw hole. This was remixed from the z axis knob I printed for my Ender 3.