tool steel construction Crafted from tool steel with special processing techniques, this dial bore gauge ensures exceptional durability and long lasting performance. The robust construction withstands rigorous use in demanding environments, making it a reliable choice. Large dial indicator for accurate readings Featuring a generously sized dial design, this bore gauge provides clear and precise measurements with a resolution of 0.001in. The easy to read dial enhances efficiency and reduces errors during critical measurements. Versatile multiple probe system Equipped with 12 interchangeable probes and multiple specifications, this tool adapts to various inner diameter measurements. Whether you are working on engine cylinders or machined parts, it offers unmatched flexibility. strength hardened probe Designed for rigorous applications, the hardened probe ensures accurate and consistent measurements even under stress conditions. Ideal for those who demand precision and reliability in their tools. Use scenarios Engine cylinder bore inspection during rebuilds or maintenance to verify inner diameter against tolerances. Quality control in manufacturing for machined parts requiring accurate inner diameter measurements. Automotive or industrial service tasks that involve precision sizing of bores and cylinders.