A nice way to get all the functionality of a "Super Switch" in a rotary form. Why rotary? You can use it in a single hole normally used by a volume or tone knob, and not have to worry about a blade switch cutout.
If you search online for "PRS 5 Way Rotary Switch Schematic" you'll find a wealth of knowledge about how to wire these. These have a standard coarse spline split shaft- ALL of our Strat/Tele style knobs and our chicken head knobs work on these fine.