Check the listing for details. Kluson KRGL-3-NP Revolution G-Mount Locking Tuning Machines - Nickel. Condition: New. Listed at 113.82 USD. The Kluson® Revolution 19:1 high ratio G-Mount tuning machine. Kluson® has truly introduced a game changer with the traditional footprint and newly designed sealed diecast housing. These state of the art tuning machines are designed to directly retrofit diecast tuning machines with a hex head bushing and adding a rear knob locking mechanism, traditional Kluson® two-screw mounting pattern and modern 25/64 inch peghole. The vintage outline, metal keystone button and pin-stripes pay tribute to Kluson® heritage while the brand new housing appearance incorporates all the features the modern guitarist demands. High gear ratio guarantees silky smooth operation, fine tuning stability with no backlash, all in a sealed one-piece housing! All mounting hardware is included. Specifications Gear ratio= 19:1 Gear Type= Steel worm and Brass ring gears Locking mechanism type= Knob on back of housing Bushing Type= Screw in with dress washer String Post height= 1 in. (25.5mm) from back of housing String Post Diameter= 6mm String Post Material= Steel Housing Material= Diecast Button Type= Metal Or Translucent Plastic Keystone shape Peg Hole Requirement= 25/64 in. (10mm) Mount Pattern= Vintage 3 + 3 Kluson Comes with all mounting hardware Kluson SKU: KRGL-3-NP Professional installation is strongly recommended. Improper installation may result in damage to the product and/or instrument.