This is a knob that I created to help people turn on lamps. Lots of lamps use those little black nubs that you have to turn to turn them on and off. They can be difficult to turn on and off sometimes and would be nearly impossible to use for someone with limited hand control. The lamp knob simply press fits onto the lamp and allows users to easily turn on and off their lamps.
Difference between files
Both of the .DWG files are my AutoCAD drawings. Feel free to download them and modify them if you like. The LampKnop3Hole3D is the file that only has 3 indents instead of four. You can use whatever variant you like.