Guyker BB101-DD Xtender Drop D Bass Tuner 1R with 1:22 Gear Ratio Model:1R improving tone and sustain and

improving tone and sustain and keeping your guitar in tone

Iron baseplate offers solid mounting support and structural stability

Button thickness at center = 9

and Silver finishes as shown

Please compare the tuner footprint

Guyker BB101-DD Xtender Drop D Bass Tuner 1R with 1:22 Gear Ratio Model:1R improving tone and sustain andKey Features: Drop D Xtender mechanism allows quick switching of the lowest bass string between two preset tunings with a simple lever movement 1: 22 gear ratio supports precise and controlled tuning adjustment Zinc alloy body with steel gear components for solid hardware strength and reliable daily use Designed as a single 1R bass tuner for the lowest string position Supplied size drawing shows a 15. 7 mm headstock hole requirement and 12. 7 mm