Perfectly accurate motion measurement for stringed instruments such as guitars, basses, mandolins, banjos and more. Guitar Neck Notched Ruler - Made of stainless steel, rust-resistant, durable and durable for long-term use. Electric Guitar Ruler - Made of high-quality, the ruler is double-sided, with fractions, decimals, and metric conversion tables on the back. This guitar action ruler can measure string height, bridge saddle height, saddle groove depth, fret groove depth, and nut height, as well as accurately measure other setting adjustments. The Neck space Gauge is designed to check the straightness of the guitar neck for the fretboard and frets. Ruler for measuring: Nut/String/Bridge/Pickup Pole/Nut Height plus Nut Groove/Fret Groove Depth Excellent tool, essential for any guitar technician or guitarist who wants to of, maintain and repair their instruments themselves. Material: Stainless steel colour: As shown Package Contents: 1 x Stainless steel lyre neck ruler 1 x String Height Ruler 1 x Wiping cloth Only the above package content, other products are not included. Note: Light reflection 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.