Understring Radius Gauge T-Ruler

Check radius and setup details without removing the strings.

Great setup work starts with clear measurement. This understring radius gauge T-ruler helps players inspect string and fingerboard radius directly under the strings, making it easier to understand what the guitar needs before making adjustments.

Why You Will Want It

• Useful for radius checks and setup measurement.
• Helps inspect the guitar while strings remain installed.
• A focused tool for players who want more accurate adjustments.

Measure with confidence, adjust with intention, and make the guitar feel closer to perfect.