A set of four of the PCB-mounting right-angle potentiometers used for the Hard Bargain distortion project. There are 2 x 100K Log pots (used for Gain and Volume) and 1 x 10K linear (Used for Bass/Treble Tilt) and 1 x 100K Linear (Used for Mid Cut/Boost). The pots are Taiwan Alpha 16mm pots, widely used for stompbox projects. They have a good solid feel and are a quality part.
They mount on the back side of the Hard Bargain PCB, which eliminates a lot of tedious and error-prone wiring, and makes mounting the PCB very simple.