StewMac SM4013 2-in-1 Precision + Serrated Straight Ruler – Long Scale Guitar

The StewMac SM4013 is a high-quality 2-in-1 straight edge ruler, specifically designed for long-scale guitars with scales from 25.3" to 25.5". This tool combines a flat precision ruler with a serrated straight edge in a single tool. The serrated edge fits perfectly over the frets of guitars with scales ranging from Gibson long scale, Fender, and Martin 25.4" to allow you to instantly and reliably check the flatness of the fingerboard.

Made of extruded 6063 aluminum and black anodized, this ruler offers a guaranteed accuracy of ±0.0015" per foot. Its precision-milled edges make it ideal for measuring neck relief, locating high frets, or checking flatness during setup or construction. This tool is carefully manufactured in Ohio, USA, and individually calibrated for maximum reliability.

Specifications:

• Model: SM4013
• Brand: StewMac
• Type: 2-in-1 straight ruler (precision + sawn)
• Suitable for: Long scale guitars (25.3" – 25.5")
• Compatible with: Gibson long scale (25.3"), Fender (25.5"), Martin (25.4")
• Material: 6063 extruded aluminum
• Finish: Black anodized
• Accuracy: ± 0.0015" per foot
• Length: 416 mm (16-3/8")
• Width: 50 mm
• Center thickness: 11 mm
• Edge thickness: 2.39 mm
• Made in: Ohio, USA
• Extra: Each ruler is individually checked for precision

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