Material - ruler is made of stainless steel, wear resistance and resistance, and high hardness. The adjustable positioning block is made of copper material with a smooth and is not easy to rust.Feature - The locating block and the stainless steel ruler are used together to make positioning and marking more convenient, just move the scale to the desired scale and lock the screw.Application - The steel ruler is suitable for carpenters, engineers, and architects, convenient for drawing, length and width measurement, scribe marking, crafting measurement and more.Package Content - 1 x Metal Ruler, 1 x Scriber Block. Double-scale metal ruler with smooth without burrs, clear numbers, and accurate scale, easy to read, suitable for both amateurs and professionals.Colour:SilverMaterial:Stainless steelSize:400mm rulerPackage Contents:1 * 400mm ruler1 * 30mm locating blockOnly 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.