The SIREN String Action gauge is an essential tool for setting up and repairing a variety of stringed instruments, including Guitar, Bass, Banjo, Ukulele and Mandolin. Three individual scales in both Inches and Millimeter...

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The SIREN String Action gauge is an essential tool for setting up and repairing a variety of stringed instruments, including Guitar, Bass, Banjo, Ukulele and Mandolin. Three individual scales in both Inches and Millimeters allow you to measure and adjust:

- String Height
- Bridge Height
- Nut Slot Depth
- Bridge Slot Depth
- Pickup height

The Siren String Action Gauge uses laser engraving on the stainless-steel tool to ensure the measurements and scales do not wear off with repeated use. This process guarantees precision and accuracy. The quality of our product speaks for itself. This is unlike other String Action Gauges available, as most of the available gauges uses a silk-screening technology, which has a tendency to wear with use.

The SIREN String action gauge has a 0.30 mm thickness, smooth edges and rounded corners, these key features prevent scratching and damage to your instrument. Unlike many other String Action Gauges which have thin, sharp edges, as well as sharp pointed corners risking damage to your instrument.

Whether you are experienced in guitar repair, or a hobbyist who prefers to set up your instrument at home. The SIREN String Action Gauge is the perfect tool to quickly, safely and accurately set up and adjust all stringed instruments. 

Dimensions: 86mm x 54mm x 0.30mm / 3.38in x 2.12in x 0.012in (L x H x W)
Weight: 11 grams



  • MULTIPLE APPLICATIONS: Measures String Height, Bridge Height, Saddle Slot Depth, Nut Slot Depth and Pickup Height on a variety of stringed instruments including Guitar, Bass, Ukulele, Banjo and Mandolin.
  • NO SHARP EDGES: The SIREN String Action Gauge has a small, lightweight, pocket-sized design with a 0.30 mm thickness. Rounded corners and smooth finished edges ensure your instrument will be safe from scratches and damage.
  • METRIC & IMPERIAL: Includes measurements in both Inches and Millimeters. Equipped with a convenient Conversion Chart printed on the rear side of the Gauge. Providing Fraction (Inches) to Decimal (Inches) to Metric (Millimeters) conversions.
  • PRECISE MEASUREMENTS: The engraved white measurements/scales on the matte black card provide an excellent contrast to the instrument strings. This contrast makes the measurements very easy to read, ensuring that your measurements are always highly accurate.
  • EXCEPTIONAL QUALITY: The SIREN String Action Gauge is made from high-quality matte black Stainless Steel. The scales and charts are laser engraved into the stainless steel ensuring the measurements are precise and will not wear off. Allowing you to enjoy the product for years to come.
  • MULTIPLE APPLICATIONS: Measures String Height, Bridge Height, Saddle Slot Depth, Nut Slot Depth and Pickup Height on a variety of stringed instruments including Guitar, Bass, Ukulele, Banjo and Mandolin.
  • NO SHARP EDGES: The SIREN String Action Gauge has a small, lightweight, pocket-sized design with a 0.30 mm thickness. Rounded corners and smooth finished edges ensure your instrument will be safe from scratches and damage.
  • METRIC & IMPERIAL: Includes measurements in both Inches and Millimeters. Equipped with a convenient Conversion Chart printed on the rear side of the Gauge. Providing Fraction (Inches) to Decimal (Inches) to Metric (Millimeters) conversions.
  • PRECISE MEASUREMENTS: The engraved white measurements/scales on the matte black card provide an excellent contrast to the instrument strings. This contrast makes the measurements very easy to read, ensuring that your measurements are always highly accurate.
  • EXCEPTIONAL QUALITY: The SIREN String Action Gauge is made from high-quality matte black Stainless Steel. The scales and charts are laser engraved into the stainless steel ensuring the measurements are precise and will not wear off. Allowing you to enjoy the product for years to come.

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