Genuine Kluson Planetary Firebird 6 Inline Reverse with Metal Keystone button, Nickel Manufacturers Part No: KVDF-6-N Brand New from Kluson! The long-awaited Kluson Banjo tuner is back! This Kluson reissue is true to the original in treble side 6 piece set commonly used on Gibson's Firebird guitars. This tuning machine set has been out of production for over 3 decades but is now available to you in it's original 12:1 planetary gear ratio and 5/16 inch string posts. The larger string posts allow for an increase of ratio to approximately 15:1. Made to the exact specs as the originals including the plated metal keystone buttons! Firebird sets of 6 treble side include mounting screws and bushings. Button Shaft dims = 5/32 in. (3.97mm) w/ opposing flat sides Button Screw = 4-48 N.F. tap String Post Diameter = 5/16 in. Gear Ratio = 12:1 Planetary Wind Ratio equivalent = 14.6:1 Mounting Screws = #4 X 1/2 in. Phillips raised head Countersink screw Bushing Dims = 13/32 in. (10mm) O.D. X 5/16 in I.D. SportHiTech are authorized Kluson dealers, and all products are factory-fresh and carry full manufacturer warranty, and are shipped in original retail packaging.