Sperzel Guitar Tuners 4/3 Trimlock SB
Sperzel Guitar Tuners 4/3 Trimlock SB, TrimLok Tuners for 7-String Electric Guitar, 4 Left and 3 right individual machine heads, Rear pinch wheel, Gear ratio: 12: 1, Pin diameter: 2.7 mm, For 10 mm bore, Colour: Satin Black, Made in USA