USAGE RANGE this tool set is suitable for measuring all kinds of electric acoustic guitar, electric , electric box guitar fretboard measured in radians to adjust the strings piano code.GUITAR BRIDGE SADDLE NUT FILES:1.Made of high-quality steels, perfect filing string slots into nut and bridge.2.With 0.4mm / 0.5mm / 0.6mm / 0.7mm / 0.75mm / 0.8mm / 0.9mm / 1.0mm / 1.05 mm / 1.1mm / 1.2mm / 1.4mm / 1.6 mm different size, 25mm grinding length and 30mm length of the hilt.3.These -shaft files are easier to than the shorter ones commonly available at stores9PCS RADIUS GAUGE:Color: silverMaterial: Stainless steel1 x 9 understring radius gauges ( 7.25, 9.5, 10, 12, 14, 15, 16, 17and 20)STRING ACTION GAUGE RULER:String ruler side:Material: plasticSize: 55mmx90mmx1mmWeight: about 10gGraduations displayed: mm and inchesMeasuring string height, frets, nuts, saddle, and other parts of a guitarHolding this card to the strings, you can visually find the suitable string height. ruler side:Could be used for gut guitars, electric guitars (raise or lower string height), acoustic guitars,and guitars (including six string guitars) to adjust space.Package Contents:1 x 9PCS RADIUS GAUGE1 x STRING ACTION GAUGE RULER1 x GUITAR BRIDGE SADDLE NUT FILESOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-57347 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it