Guyker Guitar Locking Tuners (3L + 3R Handed) 1:21 Models Rear Lock String Tuning Key Pegs Machine Head with Trapezium Handle Replacement for Electric, Folk or Acoustic Guitars Chrome

Precision 1:21 gear ratio with sealed lubrication, cast housings and metal knobs. Gear Ratio - 1:21, designed to fit modern 10mm headstock peg holes. Comfortable and easy for adjustment of string tension. Trapezium shaped button with sealed housing and 90 degree fixing tag. Mounting hardware (screws, bushings and washers) included. Guitar locking tuning machines with heavy duty internal gear, sturdy and convenient. Easy to install, easy to replace your old or dirty guitar tuning pegs. Please check the parameter drawing in the attached pics before placing your order.