Kitchen cabinet shelf stop

thingiverse

I have a cabinet in my kitchen that's held up by four plastic knobs and is shorter than the distance between them. Whenever someone gives it a nudge or pulls on it slightly, it falls right off. Check out the small knob in the fourth picture. To prevent this from happening, I came up with a shelf stop. My shelf is 16.5 millimeters thick, but you can easily adjust all the measurements by editing the .scad file.