Exceart String Guitar Gauge Guitar Action Gauge Guitar Fret Rocker Ruler Guitar Luthier Tool Elecrtic Guitar Drumstick Holder Stainless Leveling Luthier Tool Bass Leveling Ruler

made of stainless steel with a durable finish for professional use., Designed to help your to detect any discrepancy existing in frets height., For electric guitars, electric basses, acoustic guitars, folk guitars, electric box guitars, etc., Accurate straight edges can help your to detect any discrepancy existing in frets height., Which enable it to check any fretted instrument and indicate uneven fret heights, very convenient.