Gibson's vintage machine heads with pearloid buttons feature solid nickel, closed housing construction, period-correct vintage styling, and traditional pearloid buttons that deliver precise tuning, while adding a luxurious, classic feel to your guitar's headstock. Luxurious! Special note: These tuners feature screw in bushings, which require a larger diameter mounting hole than traditional 'push in' bushing tuners. • MFSKU PMMH-010 • UPC 711106550114