This is a knurled shift knob meant for manual cars to add a little bit of the gym to your car. It has an M10 hole in it. It can fit any thread pattern as it threads itself onto any screw that is M10. I have been using this shift knob for a while, and I am enjoying it very much. Not only does it just feel nice in my hands, but because of its longer size, it makes shifting even easier than before

Printing this shift knob is very easy. You can use many materials, but I would recommend PETG or ASA. I personally have not found any problem with using PETG, as that is what I used. It is one simple print without supports that doesn't take too long. I would recommend using a fine quality with a decent amount of infill and at least 4 walls to make sure it's structurally sound. 

There is little to no post-printing, as it is more of a print and then use.