High Quality Material: The guitar tuning pegs are made of zinc alloy with chrome plated finish for rust resistance, corrosion resistance and stability. Stable Sound: The guitar tuning pegs feature a very smooth mechanism, without any play, delay or looseness. A great improvement for your guitar tuning experience. Good decoration effect: With beautiful shiny silver appearance and smooth and fluent lines, it is easy to match your guitar and has a great decorative effect. Easy to install: Complete set of chrome tuning pegs for guitar strings, complete with bushings, screws, etc. for easy installation. Universal Size: Universal headstock tuner fits almost all acoustic and electric guitars. Perfect for repairs or replacements of old guitars. Sealed tuning key set for electric/acoustic guitar parts, it will fit standard 13/32 inch (10mm) headstock holes. Gear ratio 1:15. Material: Zinc alloy metal; Color: Black. Knob: Big metal knob, width about 21mm. Shaft diameter: about 6mm. Package List: 3 x Left Hand Guitar Machine Heads; 3 x Right Hand Guitar Machine Heads; 6 x Ferrules; 6 x Threaded Bushings; 6 x Screws. Color:Black Package Quantity:1 Set/6Pcs