Murdock is a tone shaping pedal derived from the EQ section of the Boss HM-2. It can be built as a stand-alone pedal, or it can be installed into an existing pedal.
This kit contains all necessary parts, except the pcb: Parts list
You can order the pcb form Kurt Ballou: God City DIY PCBs
A knob for the pot is not included in the kit, you can select it yourself. The pot has a round 6.3mm shafts.
Here´s the build documentation: