Chrome Guitar End-Pin Strap Button Jack with 2.5mm Input Jack 1/4" stereo output jacks work with standard amp cords 2.5mm jack compatible with most rod piezo pickups - makes a great no-solder harness Great as output jacks on guitars, cigar box guitars and other instruments Long threaded shaft on endpin jack perfect for Cigar Box Guitars and thicker panels Threaded nut on endpin jack must be tightened from inside the instrument body