Specification Brand : SPYMINNPOO BulletPoint1 : [Wide Range of Sizes] The package includes two narrow and two wide radius gauges in various sizes, catering to different fingerboard curvatures, ensuring compatibility with a range of instruments. BulletPoint2 : [Accurate Measurement] Made of stainless steel, the guitar notched radius gauge is engraved with precise markings, allowing you to measure and set your guitar with precision. BulletPoint3 : [Compatible with Various Instruments] Guitar notched radius gauge is suitable for guitar, bass, banjo, ukulele, mandolin, and more, making it a versatile tool for musicians. BulletPoint4 : [Accurate Measurement] Made of stainless steel, the guitar notched radius gauge is engraved with precise markings, allowing you to measure and set your guitar with precision. BulletPoint5 : [Versatile Application] Use the notched radius gauges to measure string distance, bridge saddle height and depth, fret groove depth the polished edge ensures safe during measurements. Color : Silver ExternallyAssignedProductIdentifier : 7689760028634 ItemName : SPYMINNPOO 4Pcs Guitar Notched Radius Gauge, Stainless Steel Fingerboard Ruler Fretboard Measuring Luthier Tool, for Guitar, Bass, Ukulele, 7.25in 20in Radiufor Measuring String Distance ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 10 centimeters ItemPackageDimensions_Width : 9 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : radius-gauges Manufacturer : SPYMINNPOO ModelName : SPYMINNPOOwsag6821bt ModelNumber : SPYMINNPOOwsag6821bt PartNumber : SPYMINNPOOwsag6821bt ProductDescription : Specification: Item Type: Guitar Notched Radius Gauge Material: Stainless steel Compatibility: Compatible with string instruments such as guitar, bass, banjo, ukulele, mandolin, etc.