Check the listing for details. NEW Martin Pre-Shaped Angled Bottom Bone Nut. Condition: New. Listed at 8.99 USD. Upgrade your guitar with a Martin Pre-Shaped Angled Bottom Bone Nut, a small but mighty component that makes a big impact on tone, tuning stability, and playability. Crafted from durable bone-the same material trusted in many of our Nazareth-built acoustics-this nut enhances sustain and delivers a rich, well-balanced sound by efficiently transferring string vibrations to the neck. The angled bottom design ensures optimal string contact, helping to reduce buzzing and improve tuning stability, especially on lower strings. Whether you're restoring a vintage favorite or fine-tuning your setup, this precision-cut bone nut is ready to bring out the best in your guitar. Bone: A dense, resonant material that enhances warmth, balance & sustain Pre-shaped, angled bottom nut.