Boston 043-2M machine heads for mandolin, metal shaft, 2 holes, 70mm, metal buttons

Boston 044-G machine heads for mandolin, metal shaft, 69mm, plastic buttons, gold

Boston 044-N machine heads for mandolin, metal shaft, 69mm, plastic buttons, nickel

Boston 045-G machine heads for F-style mandolin, metal shaft, 69mm, plastic buttons, gold

Boston 045-N machine heads for F-style mandolin, metal shaft, 69mm, plastic buttons, nickel

Boston 047-116 machine heads for 12-string guitar, metal shaft, 116,6mm, plastic buttons

Boston 047-116M machine heads for 12-string guitar, metal shaft, 116,6mm, metal buttons

Boston 047-125 machine heads for 12-string guitar, double drilled metal shaft, 125,0mm, plastic buttons

Boston 055-2LR machine heads for guitar, 3x left+3x right, plastic buttons, double drilled metal shaft

Boston 055-LR machine heads for guitar, 3x left+3x right, plastic buttons, metal shaft

Boston 056-L machine heads for guitar, metal shaft, metal buttons, 6x left

Boston 056-LR machine heads for guitar, metal shaft, metal buttons, 3x left+3x right

Boston 056-R machine heads for guitar, metal shaft, metal buttons, 6x right

Boston 057-LR machine heads for guitar, metal shaft, metal buttons, with cover, 3x left+3x right

Boston 057-R machine heads for guitar, metal shaft, metal buttons, with cover, 6x right