The Davies 1510 knob is one of the most popular knobs for amps and pedals, which is why we decided to make these the first plastic knobs we're offering on our site. They are easy to grip, turn, and see the level of the control you're adjusting do to the recessed painted indicator. These come in a wide variety of colors, and they are inexpensive.
Please note that these are the variant designed for 1/4 inch smooth shafts and the knobs feature a set screw to securely hold the knob in place. A threaded metal insert assures you can tighten the set screw sufficiently without the knob slipping on the shaft.
The knobs are 19mm Outer Diameter (OD) and are 14.5mm tall.
These have a hex set screw, and we'll include a hex wrench with your purchase, and an extra hex wrench if you buy 25 or more knobs.