Guitar Jack & Ferrule Tool
A must-have for guitar luthiers!
This tool offers a quick & easy way to tighten a loose jack plug on any surface-mounted input!
Insert tool into jack & use allen wrench (as shown) to tighten the internal set screw.
This gives the holding power needed to tighten the retainer nut, without having to go inside of the instrument!
Designed to friction-lock from the inside of the receiver.
(Also works great for removing 1/4" string ferrules.)
Here's a demonstration video put together by Dave's Guitar Shop: