Steel Rules, also known as Steel Rulers or machinist rules, are precision measuring tools used to measure length, width, or depth of objects in mechanical, machining, and woodworking applications. They are typically made of hardened steel and have a flat, rectangular shape with a calibrated scale or ruler marked along their length.

Steel Rules come in a range of sizes and lengths, typically ranging from 6 inches to 48 inches or more. The ruler markings on a steel rule are typically etched or stamped into the surface of the steel, providing a precise measurement scale that is resistant to wear and corrosion.

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Steel Rules are often used in conjunction with other measuring tools, such as calipers and micrometers, to verify and cross-check measurements. They are also commonly used in layout and marking-out operations, such as drawing straight lines or marking out precise distances on a workpiece.

Steel Rules are highly accurate and precise, typically capable of measuring lengths to within 0.01mm or better. They are also durable and long-lasting, able to withstand heavy use in industrial and workshop environments. Some Steel Rules also come with additional features, such as a sliding or adjustable scale, or a built-in protractor for measuring angles.

Overall, Steel Rules are essential tools for accurately measuring and marking out lengths and distances in a wide range of mechanical, machining, and woodworking applications. They are simple to use, highly accurate, and durable, making them an indispensable tool for anyone who needs to measure or mark out precise distances in their work.

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