Gauge design スワンネックゴールドファクトリーtune - パター,GK-136SP 6R Lock String Tuners For ST/TL Guitar Gear ratio 1:15,True Lok Mid-Size Locking Tuners - 6-in-line,ZX-6DL - Dakota ZX6-DL Data Logging Thru-Paint Ultrasonic Thickness Gauge Kit with T-102-2700 Probe - Z-306-0001 / Z-306-0003,Guyker GB-3639 Machine Head with 1:26 Ratio for Electric Guitar and Bass