Fangrui Product Details Fangrui Product Details Fangrui Product Details Guitar Maintain And Repair Set: You Will Get 1 Piece Guitar Neck Notched String Measurement Ruler 1 Piece 1 Piece String Action Ruler 1 Piece Fret Leveling Tool And 1 Fret Rocker String Height Gauge, Different Tools Can Satisfy Your Needs Easily. A Fast, Accurate Leveling Tool For The Pro Shop, Precise Machined Edges And Laser-engraving. String Action Gauge Ruler Measure String Height, Bridge Height, Nut Slot Depth, Bridge Slot Depth And Pickup Height. Sanding Beams Can Be Used For Fret Leveling, Fretboard Contouring, Body Sanding And Leveling Any Sandable Surface Flat, Attach The Abrasive Of Your Choice To Quickly Level Frets Or Level An Unfretted Fingerboard. Guitar Neck Notched Straight Edge: Dual Scale Design, Works Well With Most Guitar, Specially Suits For (24.75 Inch ) And(25.5 Inch) Electric Guitars. Wonderful For Checking Guitar Neck Straightness And Flat Of The Fret Board And Frets. Fret Rocker Design With 4 In 1, Spans Nearly Three Frets, You Can Examine Any Fretted Inst Ent And Indicate Uneve