Musiclily Individual Bass Sealed Tuning Pegs Keys Machine Head Tuners Left Hand for Precison Bass and Jazz Bass,Black Single economy sealed bass tuning key for 4 String, 5 String or 6 string bass guitar Fits for common size 9/16 inch(14mm) peg hole Material:Metal Alloy; Gear Ratio 19:1 Left handed bass tuner; Nut,Ferrule,Screws included Package Includes: 1x Bass machine head