This is a kill switch for an electric guitar. It can be installed without major modifications to the guitar. The mounting hole size is 10mm, so it can be installed directly on guitars with inch-sized holes. However, for Asian-made guitars, you may need to expand the hole slightly with a reamer or similar tool. Installation is possible if the depth of the cavity is 28mm or more. The lead wires are approximately 18cm long. Red lead wires may also be included, but they are the same product, so please rest assured. Please refer to the illustration in the photo for an example of the wiring. Please consider installation at your own risk and with the assumption that some modification may be required. We will check for electrical conductivity before shipping. Anonymous shipping is available. Please refrain from price negotiations. This is not a fu-tone product. Search terms: fu-tone tesi kill switch futone Buckethead