DiMarzio Switchcraft 1/4" Stereo Guitar Output Jack Socket Input EP1302. DiMarzio brings you this Switchcraft 1/4" (6.3) Stereo Output Jack so you can keep the relationship between your instrument and your instrument cable tight. Stereo unit with mounting hardware. Get it now because relationships are all about communication. This is a standard size guitar or stereo output for a standard size guitar lead, stereo plugs are often used when a guitar has an active pickup system with an internal battery.