Fangrui Product Details Fangrui Product Details 1. [3-in-1 Fret Bevel File]the Fret Bevel File Have 3 Angles, 3, 23, And 35, Specifically Designed For Remove Fret Sprouts And Burrs. To Avoid Damaging The Fingerboard With Excessive Force, Please Put A Layer Of Textured Paper On The Fretboard For Protection Before Use. 2. [instructions For Use]choose The Angle And Tighten The Two Screws, First Use A 3 Angle For Filing, Fret Budding, Flush Filing Or Tang Removal, Then Choose The 23 Angle For Secondary Grinding. If You Need A More Beveled Angle, You Can Use The 35 Angle For Grinding. 3. [luthier Tools]the Guitar Fret File Is An Essential Tool For Guitar Building, Made Of High Carbon Steel With Both Side High Precision Serrated Teeth. You Can Easily Remove Fret Burrs And Fret Sprouts. 4. [widely Applicable]the Fret End Dressing File Was Developed To Polish The Fret End. Works On All Frets. Guitar, Basseselectric Pianos, Ukuleles, Ukuleles, Banjos, And So On. 5. [save Money And Effort]guitar Are More Expensive To Repair At A Repair Store Or To Re