Here’s yet another handy new product from Car Builder Solutions – it’s a little three-position rotary on/off/on switch (part number #ROSWSR2) that features three ¼in spade terminals, mounts to a 12mm hole and a maximum panel thickness of 8mm.

Excuse me for this one but the knob diameter is 23mm and looks like a bargain at £13.20 inc VAT. More information from ENDS.