Description: With a simple structure, the guitar luthier tool is convenient to carry and store. With full and clear scale design, the radius gauge ruler can accurately measure the radius of the sill board, the radius of the saddle nut from the top or bottom surface of the radius. It can keep your string instruments in almost the best playing condition, helping you set your instrument with precision so you can break right chords without stressing your fingers. Made of stainless steel and plastic materials, the product is stainless steel, scratch-resistant, durable and has a long service life. The length of the string jump ruler is 8.9cm, width 5.1cm, height 0.2cm. Suitable for string instruments, such as guitar, acoustic guitar, bass, ukulele, mandolin, etc. Item Name: Guitar Measuring RulerMaterial: Plastic, Stainless Steel Color: Silver Size: 8.9cm x 5.1cm x 0.2cm/3.5inx2.01inx0.08in Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included:1 X Guitar Measuring Ruler9 X T-Shaped Radan Rulers