Digital Rail Straight Edge Digital Rail Straight Edge is used for measuring vertical railway line rail abrasion and flank wear, it includes reference positioning frame and installed on the framework of reference positioning auxiliary positioning screw and the depth of the rail vertical abrasion, side abrasion measured in feet, its structure is simple, intuitive and accurate measurement data, and upper and lower rapidly, operator safety, its light weight, convenient to carry. Benefits Digital Rail Straight Measuring Ruler has the advantages of high measuring accuracy,easy to operate,LCD digital display etc. Specification Model LJ-ZD-I Type Digital Straight Edge Material Carbon Steel Dimensions (L x W x H) (mm) 120*12*24 cm Measurement range �±5 Indication error ±0.06 Measuring length 1000