- Unique Design: This 1-2-3 precision block features 23 holes for versatile applications and is constructed as a hexahedron, meticulously ground and hardened on all sides. - Durable Material: Manufactured from hardened steel with a hardness rating of HRC 57-62, these precision blocks ensure long-lasting performance and reliability. - Exact Specifications: The block set measures 1" x 2" x 3" and is ground to tolerances of 0.0001", guaranteeing unmatched precision for your projects. - Versatile Applications: Ideal for setup, layout, and inspection tasks across various machine tools, these precision blocks are essential for maintaining high accuracy in machining operations. - Practical Use Cases: Perfect for aligning workpieces in milling operations, providing stability during drilling processes, or ensuring precise measurements in assembly tasks, enhancing overall efficiency and accuracy in your workflow. - Compatible Functionality: Works seamlessly with various types of machine tools, aiding in the precise and efficient execution of engineering tasks.