ITEM NAME:Guitar Notched Radius Gauges for Measuring Fingerboard Radius Pack Of 4pcs A6D5 Guitar Notched Radius Gauges for Measuring Fingerboard Radius Pack Of 4pcs A6D5 Handy when you want to check a fingerboard without taking the strings off The set includes closely-spaced string notches for use near the nut (narrow), and wider spacing for use near the body (wide) The radius gauges comes in all popular fingerboard radii. (7.25 inch, 9.5 inch, 10 inch, 12 inch, 14 inch, 15 inch, 16 inch and 20 inch) Precision laser-cut and each being etched with the radius and inchNARROW inch or inchWIDE inch. Practical tools and be convenient to carry out colour: Silver Material: Carbon Steel size: 8.8*8.8*0.4cm Package Contents: 4*Guitar Notched Radius Gauge Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.