Musiclily 6-in-line Guitar Tuners Tuning Pegs Keys Machine Head Set Right Hand,Keystone Button Black Ideal for acoustic and electric guitar ,It will fit standard 13/32 inch (10mm) peg holes Material: Alloy metal ; Gear ratio 15:1Color:Black Sealed style tuning keys, metal keystone buttons 6 in line set; Nut,Ferrule,Screws are included Package includes: 6 Pcs Guitar Tuners