Genuine Gibson tuners, model PMMH-010. These are replacements for tuners like Grover, which are secured to the headstock from the front with nuts. The peg hole diameter is 10mm. I purchased these to replace the Grovers currently on my guitar, but my plans changed, so I'm selling them. They are new and unopened. The following is an AI-generated description: Set of 6 vintage-style nylon tuning heads. - Brand: Gibson - Model: PMMH-010 - Type: Vintage Nylon Tuning Heads - Button Material: Pearloid - Quantity: Set of 6 Thank you for looking.