Creanoso Roller String Tree Guides Retainer (4 pcs) - for Fender Strat Stratocaster Tele Telecaster Electric Guitar Compatible with electric guitar and bass Lessen the stress on your strings, which allows the guitar to stay in tune longer Fit for Fender Strat Stratocaster Tele Telecaster Electric Guitar Prevents wear and tear on the strings which results in longer string life Great replacement for your broken, dirty or old string retainer.