Versatile tool for adjusting guitar and bass. The string height, neck curvature and string spacing can be quickly and precisely measured and adjusted with this simple gauge. Measurements in millimeters and inches also make it possible to adjust using American specs without conversion. The practical recommendations on the back provide tips for adjusting the string height of electric guitars and acoustic guitars, as well as electric basses. With its practical business card format, the Rock n Ruler fits perfectly in every wallet and is always there when you need it. Specs: String ruler - Stainless steel - Dimensions in millimeters and inches - Ruler for adjust string heights - Neck Curvature and String Spacing - Recommended settings on the back - Size: 90 x 50 mm - Delivered in paper envelope.