1The ruler is made of carbon fibre which has the characteristics of high temperature resistance, friction resistance, electric conduction and corrosion resistance. 2Accurate digital display for clear reading,more convenient. 3High resolution.The resolution of the ruler is as high as 1mm. 4Large measuring range.The ruler can measures length up to 200mm,suitable for various of works. 5The ruler is suitable for measuring for the woodworking, construction, machining and mould industries.