Hipshot Vintage Guitar Tuner Upgrade Kit (6 Inline Headstocks) Chrome Bass. Vintage style tuners retrofit guitars with 21/64 (8.5mm) headstock holes Grip-Lock pin and thumb wheel system clamps onto your string, no wraps needed Included UMP (Universal Mount Plate) means no drilling or filling 15:1 tuning ratio Includes 6 Inline Headstocks, Universal Mount Plate, Nuts, Washers, and Lumintrail Polishing Cloth. As our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected.