E Support 3PDT 9 Pins Box Stomp Guitar Effect Pedal Foot Switch True Bypass Metal Pack of 5 For rewiring vintage padals or effect boxes For ,Electro-Harmonix, T Rex,Retro FX,Radial Bigshot,ect effects pedals The third pole can be wired to control an LED status light or other custom function. There are a total of nine lugs on each switch,three per pole. For unbuffered bypassing/true bypass of the effect circuit without coloring the tone of the instrument or other components in the signal chain.