Set of 9 Yootones Guitar Understring Radius Gauge Tool Standard Width Guitar Setup Compatible with Guitar Bass Setup Luthier Tools (Silver)

["Guitar understring radius gauge tool,Bass understring radius gauge tool is compatible with guitars electric guitar, electric bass, acoustic guitar, acoustic guitar, electric box guitar fretboard measured in radians, and radians to adjust the strings piano code.","Guitar understring radius gauge tool,Bass understring radius gauge tool is stainless steel material,Obtain accurate measurements of your instrument's fretboard radius using the bottom radius of the gauge.","Set of 9 including: 7.25\", 9.5\", 10\", 12\", 14\", 15\", 16\", 17\" and 20\" radius,A must have for bass guitar maintain and adjustment.","Spans string spreads up to 66.68mm, ideal for 4-string, 5-string, and many 6-string basses; they'll also handle 7-string and 8-string guitars.","Fast, accurate bridge saddle adjustment. These come in the most popular fingerboard radius and make it easy to measure the radius from either above or below the strings."]