Engineering Material and durability: Gauge blocks are crafted from speed steel for exceptional durability and long life. Hardness and wear resistance: A hardness of 64 provides strong wear resistance for extended use. Quality and reliability: Each block undergoes rigorous manufacturing standards to prevent damage and ensure long term reliability. Temperature for accuracy: operating temperature is 68 degF (20 degC); at this temperature the blocks achieve the accuracy for professional workshops and inspection environments. Versatile Applications Calibration and alignment: Ideal for calibrating fixtures and instruments in workshops. Inspection and metrology: Essential for inspection and dimensional metrology applications, including precise alignment of mounting tools, knives, and fixtures. Broad utility: Suitable for mechanical parts and the gauge manufacturing process, offering a versatile solution for various industrial needs. Specifications Material: speed steel Size range: 0.5 mm to 100 mm Dimensions: Thickness 9 mm, width 35 mm Accuracy: Less than 0.0005 mm, providing the exacting standards required for critical measurements Complete Package Includes a gauge block designed to meet the stringent demands of professionals in the field Robust construction and engineering allow seamless integration into your existing toolkit Suitable for regular use or specialized tasks, delivering reliable, precise measurements