Fishman® Switchjack™ tightens from outside the guitar, for easier installation. Accepts a standard 1/4" plug. 

Can be wired for mono or stereo with simultaneous battery switching.15/32" diameter, for 1/2" mounting hole. Instructions included.

Tip (positive) is shortest terminal.Ring (stereo output) is mid-length terminal.Switch (for battery) is long terminal.Ground is long arm coming from side of jack.Manufactured exclusively for Fishman by Switchcraft Inc.