The item can be used to rewire vintage pedals or effects boxes For unbuffered bypassing/true bypass of the effect circuit without coloring the tone of the instrument or other components in the signal chain. The third pole can be wired to control an LED status light or other custom function. The triple pole switch allows you to wire in an on/off indicator led, if desired, while the Dpdt does not. It's also a very tough switch that will last a very long time There are a of 9 lugs on each switch, three per pole. AT least 7/8 inch depth and 1/2 inch-diameter mounting hole are required. the threaded portion is 7/16 inch tall. length:43cm color: blue Material: metal + ABS Package Included: 2x Effects Pedal Switches Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.