On-Stage GSW500 Guitar String Winder Our GSW500 Guitar String Winder enables the user to quickly rotate tuner knobs with no wrist twisting and speeds up the process of changing strings on a wide range of guitars, banjos, and other folk instruments. More than just a winder, its built-in leverage notch helps remove acoustic bridge pins without marring the pins or guitar finish. General Features: Speeds up string loosening and tightening to facilitate string changes Durable plastic head ensures reliable operation and won't scratch tuners Built-in notch safely and comfortably removes acoustic guitar bridge pins Works with a wide range of guitars, banjos, and ukuleles Product Properties: Application Guitar or small folk instrument Color Black Construction Plastic Warning: This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.