Features: Experience precise with our high accuracy positioning block, designs for durability and resistance to corrosion, ensuring stability and accuracy over long terms use. Featuring a positioning block designs, this tool allows for precise measurement with clear, easy to read surfaces graduations. Suitable for engineers, carpenters, DIY enthusiasts, and professional requiring exact measurement, this tool is in any toolkit. Perfectly suited for industrial manufacturing, woodworking projects, and laboratory research where precise measurement is critical. Enhances your measurement tasks with this reliable gauges, crafted from alloy for added strength and longevities, making it essential instrument in precise environment. Specifications: Component:Alloy Color:Silver Option Type:20MM,26MM,29MM,39MM; Package Includes: 1pc Ruler Stop note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.