String Action Gauge Ruler, Guitar Height Gauge Set Up Tool for Electric Bass and Acoustic Guitar

guitar measurement tool which made of stainless steel which is stable,durable,beautiful and widely used, Guitar set up gauge fit for string height, for ridge saddle slot depth and for nuts saddles and pole pieces, With conversion chart of string action at 12th fret printed on one side, Guitar ruler fit for electric guitar, Bass , acoustic guitar,mandolin,banjo,etc, Handy Luthier Tool-Convenient ,pocket-sized ruler which can take to everywhere you like.Package including: 1 x String action gauge, 1 x Instruction