• 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