String Action Ruler Gauge Tool in/mm for Guitar Bass

Features:With scale for string height for ridge saddle slot depth and for nuts saddles and polepieces.With conversion chart of string action at 12th fret printed on one side.Long lasting etched printing the printing will not wear off from long use.Suitable for string instruments such as guitar bass mandolin banjo etc.Specifications:Material: Stainless steelUnit: mm / inScale for string height: 0.01-0.14in / 0.25-3.50mmScale for bridge saddle slot depth: 0-0.875in / 0-20mmScale for nuts saddles and polepieces: 0-0.75in / 0-20mmRuler size: 8.9 * 5.1cm / 3.5 * 2in (length * width)Ruler weight: 21g / 0.7ozPackage including:1 * String Action Ruler1 * Instructions for Use