9Pcs Understring Radius Accessories Bass Guitar Gauge Repair Middle T Shape Luthier Builder Stainless Steel Instruments Features: *1. For most guitars-all kinds of electric guitar, electric bass guitar, acoustic guitar, electrical box guitar neck measured in radians, and radians to customize the piano string code. * 2. Accurate Measurement - Get an accurate measurement of the instrument's fretboard radius using the bottom gauge radius. *3. Easy to use-Fast, accurate bridge saddle adjustment. They are in the most popular fingerboard radius and make it easy to measure the radius of either above or below the string. * 4. Set 9 includes: 7.25", 9.5", 10", 12", 14", 15", 16", 17" and 20" radius. * 5. Essential tools for bass guitar maintenance and adjustment. Description: Material: Stainless Steel Color: Silver Size(Approx.): 66*70mm Radius: 7.25",9.5",10",12",14",15",16",17",20" Package Included: 9*Pull-up Radius Indicator Notes: 1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.