Classical, Flamenco Guitar Machine Heads tuners from Der Jung – This is a classy design machine head set series made by Der Jung for Classical or Flamenco guitar. It includes 6 Machine heads with oval black buttons with antique finish metal plated sides. Also included are matching color screws for perfect installation. The DJ403AB s have 35mm rollers space and 110mm total length, 1;14 Gear Ratio. The DJ403AB are made of heavy duty metal, with an antique metallic finish. The oval buttons are made of an ebony-like material and are reinforced with inside screws for a softer and more accurate tuning.