1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;
2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.
3.Made of stainless steel which is stable,durable,beautiful and widely used.
4.Suitable for string instruments such as guitar, bass, mandolin, banjo, etc
5.It's faster to use than any ruler, and stays parallel to the fingerboard-much easier than trying to hold a ruler perpendicular to a rounded fret.

Package include:
1 x String Action Gauge Ruler