Features: Made from stainless steel material, sturdy and durable, rust proof and wear-resistant, not easily damaged. Fingerboard Polishing Gasket protect your guitar or bass fretboard frets from scratching or damaging while filing and polishing. Durable String Height Gauge ruler with precisions etched markings, will not easily wear off from continued use. Suitable for measure string instruments such as electric guitar, electric bass, acoustic guitar, acoustic guitar, electric box guitar fretboard measured. Accurate, convenient, pocket-sized measuring tool can be taken to everywhere you like. Specifications: Material: stainless steel Style: 2 Pcs Polishing Gasket/Guitar Neck Notched Straight Edge Ruler/2 Pcs String Height Gauge/4 Pcs Guitar Notched Radius Gauges Size: As shown in the picture Package Includes: 2 Pcs Polishing Gasket/1 Pc Guitar Neck Notched Straight Edge Ruler/2 Pcs String Height Gauge/4 Pcs Guitar Notched Radius Gauges note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.