Our basic "Tone-Lock"™ is comprised of unique "vintage" STEEL studs and spacers, featuring our solid "No Gap" technology, and can be used with any standard sized stop tailpiece. "Tone-Lock"™ comes with 2 steel studs, in Imperial (inch) or metric thread, plus 3 pairs of spacers to place your tailpiece at your preferred height. Spacers can even be "stacked" for further customization and comfort. This is the best and most innovative tailpiece locking system available today, guaranteed to increase sustain! Please review the Faber® Guitar Parts F.A.Q. to see which product is right for your guitar.