Lamp Knob

I have a lamp that had an annoying smooth knob on the switch. Every time I tried to use it, I ended up pushing the lamp down. Here is a chunky knob that I can get my big mits on and not end up chasing the lamp.

The rotary switch stem is 6mm outside diameter. I didn't design knurls on the inside of the knob, but it's snug enough that it doesn't slip on the stem.

You can adjust for the size of the stem by adjusting the cylinders and cube under "Cut003" in the FreeCAD file.