Precisely adjusted the distance of the notched, let it not just fit for fender and gibson, also for others. Fit more guitars than other neck straight edge.Use side of notched for fingerboard straightness check, and side of complete for fret wires levelness check.Made of Stainless steel with nice oxidation blasting treatment.Precise machined edges and engraving.size:43x3x0.25CMMaterial:Stainless steelcolour:silverPackage Contents:1 * neck rulerOnly the above package content, other products are not included.Note: Light shooting 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.