Features: Make of metal materials, Strong and Enduring, not easy to damage, can be used for a long terms. It has the function of measuring the distance between the guitar string and the neck, which allows the string distance to be accurately measured. Guitar gauge ruler equipped with other practical functions, such as Scale to measure string diameter, scale measurement, provide more functions. The scale and numbers of the guitar string action ruler are clearly visible, easy to read and identify. The design takes into account the differences of different guitar types and is applicable to measuring the string spacing of different guitar types. Specifications: Materials: Stainless steel Size: as shown in the picture Package Includes: 1pc Guitar Gauge Ruler note: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color of the item.