Set of 6 double-locking 510-type tuning pegs, with mounting screws. - Model: 510 - Type: Double-locking - Quantity: Set of 6 - Accessories: Mounting screws included These are GOTOH tuning pegs. Since the work was entrusted to a repair shop, I don't know the details even if you ask. Sorry! I think I bought them about 10 years ago. Thank you for looking.