●The mounting screws are located in the center of the machine head, mainly used for Epiphone Lespole and Acoustic Guitar ●Peg Mounting Holes: 0.4 inches (10 mm) ●Material: Metal alloy; Gear ratio 15:1 ●Set of 6 (3 to 3); nuts, ferrules and screws included ●Package includes: 6pcs (L3+R3)