String Swing Guitar Jack and Ferrule Tool Brass
This Jack and Ferrule tool offers a quick and easy way to tighten a loose jack plug on any surface-mounted input. Just insert the tool into the jack and use the Allen wrench to tighten the internal, hexagonal-head, set screw. This gives the holding power needed to tighten the retainer nut without having to go inside the instrument. This tool also works great for removing 1/4" string ferrules.