Guitar maintain and repair set: you will 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 . A fast, accurate leveling tool for the , 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 can be used for fret leveling, fretboard contouring, body sanding and leveling any sandable surface flat, attach the abrasive of your to quickly level frets or level an unfretted fingerboard. Guitar Neck Notched Straight Edge: Dual scale design, works with most guitar, specially suits for (24.75 inch ) and(25.5 inch) electric guitars. 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 instrument and indicate uneven fret . With scale for string height (.50-4.0mm) on one side. Material: Metal colour: black Package Contents: 1 x leveling ruler 1 x ruler 1 x triangular ruler 1 x chord gauge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.