The multi-functional fret and string gauge tool is perfect for luthiers and guitar enthusiasts. Its compact design allows for effortless handling while measuring string distance, neck alignment, and bridge height. This tool enhances accuracy during guitar maintenance, ensuring a smooth playing experience and professional- . Features -Color:Silver -Material:Metal, Plastic -Size:42.00X3.70X0.20cm/16.51X1.45X0.08in -Size:7.00X6.30X0.10cm/2.75X2.48X0.04in -Size:8.50X5.40X0.10cm/3.34X2.12X0.04in -Size:10.00X5.00X0.15cm/3.93X1.97X0.06in -Accurate calibration: achieve perfect string action and improve your guitar's sound quality with precise measurements -Versatile use: designed for both electric and acoustic guitars, meeting diverse requirements for different instruments -Efficient string height measurement: quickly measure and adjust string height to ensure optimal playability and comfort -Professional : essential for both hobbyists and professional luthiers to maintain and finetune guitar performance -Convenient portability: lightweight and portable, making it easy to carry and use in various settings, from home practice to live performances Package list: 9 x Understring radius gauges 1 x Guitar luthiers tool 1 x Fret rocker 1 x String action ruler