These knobs we're made by me. This is the first set I've offered up for sale straight up as opposed to the several requests I've received to make them. Each knob is a 5 piece laminate of Maple, Purpleheart, and Birch. The size is 3/4" x 3/4" which is fairly standard. The center bore is 1/4" with a 3/32" recess to clear most nuts on the base of the pot. The finish is natural oil and wax. Each one also has a set screw. I'm selling this set at a special price since they we're actually the result of a new design I was working on. The set is $20 + $2 shipping to the lower US. I'm hoping that someone out there has a P bass or other bass that only has 2 knobs and needs some sweet knobs like these to be the finishing touch.