ITEM NAME:Pack of 6 Universal Guitar Tuner Machine Head Semicircle Buttons Tuning Key Description: Exquisite and high quality for your guitar machine head tuning peg Excellent workmanship, polished and wonderful appearance Universal guitar tuning pegs buttons Use file to enlarge the hole Material: zinc alloy Size Chart: Size: 22x17.5mm/0.87x0.69inch Installation Hole Dimension: Approx. 4 x 3.8mm/ 0.15 x 0.15inch Package Includes: 6 Pieces Tuning Peg Buttons (including screws and gaskets) Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2cm error in size. If the mounting hole is too small, you can make it bigger by grinding the hole through the file. SKU: CKX0015832278011692.Universal guitar tuning pegs buttons. Exquisite and high quality for your guitar machine head tuning peg. 6 Pieces Tuning Peg Buttons (including screws and gaskets). If the mounting hole is too small, you can make it bigger by grinding the hole through the file.