Kluson® 3 Per Side Vintage Diecast Series Waffleback® Tuning Machines - KVDW-3-GThis top of the line diecast Kluson tuning machine, known as the Super, Waffleback, or Radiator Back had been out of production for 40 years. This specific model was used on early Gibson Les Paul Customs in the 1950's. The 15: 1 gear ratio offers superb performance and reliability and it looks exactly as it was originally intended.