Grover 509BC Locking Rotomatics 3+3
Grover 509BC Roto-Grip Locking Rotomatics with 3-Step Button - Guitar Machine Heads, 3 + 3 - Black Chrome, locking guitar machine heads, Roto-Grip Locking Rotomatics with 3-step button, closed gear, ratio: 18:1, 6 pieces: 3x left, 3x right, thumb screw locking mechanism, axis diameter without mounting sleeve: 5.9 mm, black chrome finish