Description: 【Versatile and Functional】: This guitar adjustment wrench set is ideal for narrow or deep rod adjustments, The various hex wrench gauges are suitable for most guitar screw adjustments, making it a versatile tool for all your guitar maintenance needs. 【Material】: Made from steel, this guitar wrench set is resistant to wear and tear. It ensures a longer lifespan, providing you with a reliable tool that stands up to frequent use. 【Guitar Maintenance Tool】: This set includes understring radius gauge  for adjusting the curvature of your guitar neck and measuring its radius. It's an ideal tool for professional guitar craftsmen or those who want to maintain their instrument's optimal performance. 【Easy to Use】: This complete set of guitar maintenance tools is easy to repair and adjust guitar.  【Package Includes】: Contains all the necessary tools including 4mm & 5mm ball end rod wrench repair tool, 8  wrench,  1 guitar rod wrench ,9  T shaped radius pulers . Size Chart: Guitar Allen Wrench:0.4cm/0.16inch 0.5cm/0.20inch Guitar Rod Wrench:0.635cm/0.25inch Understring Radius Gauge:7.25#,9.5#,10#,12#,14#,15#,16#,17#,20# Wrench:0.15cm/0.06inch 0.2cm/0.08inch 0.25cm/0.10inch 0.3cm/0.12inch 0.35cm/0.14inch 0.4cm/0.16inch 0.5cm/0.20inch 0.6cm/0.24inch Package Includes: 2 Wrench Repair Tool 1 Guitar Rod Wrench 9  Understring Radius Gauge  8  Wrench  Note: Please allow slightly errors due to manual measurement and different monitors.