The Kluson® Revolution G-Mount 19:1 high ratio tuning machines offer the traditional Kluson® footprint and a newly designed sealed die-cast, one-piece housing. High gear ratio guarantees silky smooth operation, fine tuning stability with no backlash. These state of the art tuning machines are designed to directly retrofit die-cast tuning machines that have a hex head (collared) bushing and a traditional Kluson® two-screw mounting pattern. Uses the common modern in. (10mm) peghole. The G-Mount pattern makes these a great drop-in replacement for the modern “Gibson® Deluxe” collared tuning machines found on many models. No modification or unused holes! All mounting hardware is included. Precise 19:1 gear ratio for smooth operation Sealed diecast,one piece housing Traditional Kluson® two-screw mounting pattern with collared bushing. Metal keystone button Available in Nickel or Gold