Description: [Measuring Tool]:This is a guitar neck straightness measuring tool,ideal for measuring neck curvature and adjusting the fretboard.It is an essential tool for guitar for calibration and maintenance. [Material]:This guitar leveling digital ruler is made of premium metal and electronic components to ensure its service life and reliability in use. [Size]:The neck measuring rod measures 30cmx4cmx1.1cm,while the digital display ruler measures 5.7cmx2.5cmx12cm,making it compact enough to be handheld,but large enough to provide accurate readings. [Multi Function]:This guitar ruler tool set is not only suitable for electric guitars,but also can be used for other stringed for instruments that require for calibration or repair work,making it a necessary tool set for professional luthiers and DIY enthusiasts. [Package List]:Each package comes with two measuring tools,a for checking the straightness of the guitar neck and the other for accurately measuring the fretboard. Specifications: Material:Metal,Electronic Component Size: Measure the Rod:30cmx4cmx1.1cm/11.81inch x 1.57inch x 0.43inch Digital Display:5.7cmx2.5cmx12cm/2.24inch x 0.98inch x 4.72inch Note: Please allow slightly errors 1-2cm differences due to manual measurement. Package included: 1 Piece Measure the Rod 1 Piece Digital Display