Grooved knob
thingiverse
This is a customizable knob or handle designed specifically for turning objects, such as the 55-gallon plug I created. I drew it with the intention that others might find it useful as well.
Download Model from thingiverse
With this file you will be able to print Grooved knob with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Grooved knob.