Uploaded September 2016 | Updated September 2026, 15 hours ago
Graph Tech Guitar Labs is the world's largest Guitar Nut & Saddle manufacturer, also offering a wide range of other Guitar Parts & Accessories.
Ratio Machine heads give you predictable, precise tuning on every string. How? The gear ratio in each RATIO machine head is tuned to its string position so that every string responds the same to any tuning adjustment — One Turn = One Tone.
Graph Tech Guitar Labs is the world's largest Guitar Nut & Saddle manufacturer, also offering a wide range of other Guitar Parts & Accessories.
Ratio Machine heads give you predictable, precise tuning on every string. How? The gear ratio in each RATIO machine head is tuned to its string position so that every string responds the same to any tuning adjustment — One Turn = One Tone.
![BLACK TUSQ [CH] Slotted Nut Install](https://i.ytimg.com/vi/FUDvF3aDGmA/mqdefault.jpg "BLACK TUSQ [CH] Slotted Nut Install
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