The inch metric ruler is made of stainless steel, 0.8mm thick with wear resistance and corrosion resistance, and high hardness. The adjustable positioning block is made of copper material with a smooth surface and is not easy to rust. 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. The metal ruler is suitable for carpenters, engineers, and architects, convenient for drawing, length and width measurement, scribe marking, crafting measurement and more.