ITEM NAME:Guitar Bass Luthier Tool Kit Set With 9Pcs Understring Radius Gauge + Steel F8N4 Guitar Bass Luthier Tool Kit Set With 9Pcs Understring Radius Gauge + Steel F8N4 Suitable for measure all kinds of electric guitar, electric bass, acoustic guitar, acoustic guitar, electric box guitar fretboard measured in radians, radians to adjust the strings piano code including: 7.25inch , 9.5inch, 10inch, 12inch, 14inch, 15inch, 16inch, 17inch and 20inch radius, a must have for bass guitar maintain and adjustment, these come in the most popular fingerboard radius and make it easy to measure the radius from either above or below the strings great for space spacing measurement from 0.0015 Inch (0.04mm) to 0.035 Inch (0.88 mm) with dual marked metric and imperial - Inches and Millimeters length easy and convenient to take and store The string winder and cutter integrates string winder, cutter and bridge pin puller in a one body for convenient use, string action ruler with scale to measure string height, bridge saddle height, saddle slot depth, pickup pole piece height, fret slot depth and nut height, fingerboard guard and grinding stone are designed to protect your guitar or bass fretboard from scratching or damaging while filing and polishing Color: picture color Material: Stainless steel Package Content: 9* T-shaped ruler 1* feeler 1* refers to the ruler 2* guard 1* sanding block 1* three-in-one tool