These are the same tuning keys that Kluson put out 40 years ago. Also known as Radiator Back™, these tuning keys were used on LP's, ES-355's, early LP SG Customs and other high end guitars. The 50's Keys have plastic buttons. This is for a New set.

• If you are installing these tuning keys on a guitar that currently has modern style tuners, you will need to purchase the new gold conversion bushings .