Guitar Luthier Tool Kits: included 1 piece guitar neck notched string measurement ruler, 1 string action ruler and a piece of wiping cloth, satisfy your needs easily. Material: Made of stainless steel, sturdy enough for your long term use and not easy to scratch your guitars. Keep the Guitar Neck Straight: the guitar straight ruler, fret leveling tool and the guitar string ruler help you to measure if the surface of the fingerboard is straight and check the final height after you've redressed or replaced them. Wide usages: the string action ruler helps to measure bridge slot, the height of the string, nut and pickup polepiece, even the depth of the fret slot; The notched straight ruler helps to check if each fretboard is in the same level, the fret rocker can check if frets on the same level. Nice Gifts: these guitar luthier tools are good gifts to guitar technicians and guitarists, Good for electric guitar, acoustic guitar, bass, banjo and folk guitar, etc. Specification: Material: Stainless steel Size Chart: 42cmx3.7cm/16.54inx1.46in Package Includes: 1 Wiping Cloth 1 Guitar Neck Notched Straight Luthiers Tool 1 String Action Gauge Ruler Note: Please allow slightly measuring deviation due to manual measurement.