Musiclily 3+3 Sealed Bass Tuning Pegs Keys Machine Head Tuners for Precision Bass or Jazz Bass, Black Economy sealed bass tuning keys set for Precision Bass or Jazz Bass Fits for common size 9/16 inch(14mm) peg hole Material:Metal Alloy; Gear Ratio 19:1 3x3 bass tuners set; Nut,Ferrule,Screws included Package Includes: 6 x Bass Tuning Pegs; 6 x ferrules;6 x screws(3R+3L)