Evidence Audio SiS-plug is a revolutionary phone plug that enables you to make reliable solder-free leads when used with the same company’s "Monorail"-cable. This plug is very compact, which frees up space on a well-filled pedalboard. Evidence Audio SiS-plugs are manufactured in the USA to the strictest quality standards.We at Custom Boards have literally made thousands of patch cables using this plug, and we’re still baffled by the SiS-plug’s reliability and its ease of use. This plug’s secret ingredient is its internal brass thread, which is used to “screw in” the Monorail cable. This connector is extremely reliable and oxygen-free, making it – in many cases – a better solution than the traditional solder joint.