I think we’re all familiar with the struggle. You’re working on a project, need a knob for a jig, and lo and behold you don’t have one the correct size. To avoid this frustrating problem all together, I have just started to make my own knobs, like you see here. A Series of Holes. The knobs are easy to make. I make mine out of plywood and start by laying out a series of holes. Then, after spending a few minutes at the drill press drilling the holes, I can cut the knob out and am left with the perfect knob. The best part of all is that they can be made for any size thread, simply by installing a different T-nut. One of the great uses I found for these was to combine them with a piece of stock cut into a curve. They make the perfect hold-down.