Features: Exact Size Verification: The 1-unit rectangular piece with a hole ensures high-accuracy size, ideal for mechanical processing and laboratory use, providing a stable and reliable measuring solution. Strong Material Choice: Crafted from high grade steel, it offers excellent resistance to corrosion and extended period of use compared to standard steel, suitable for prolonged industrial applications. Flexible Mounting Design: The hole design supports various attachment techniques, enabling quick installation without extra equipment, improving operational productivity on workbenches and machinery. Wide Usage Areas: Perfect for engineers and technicians in intricate projects, it manages both accurate instrument alignment and routine equipment maintenance with ease. Easy Portability: Streamlined design for simple carrying, it is ideal for field personnel to perform size verification in different locations, minimizing inconvenience caused by large equipment. Specifications: Component: Steel Size:Approx.20.5x20.4x20.4mm/8.07x8.03x8.03inch Practicality: Suitable for precise positioning and adjustment of machining, calibration and measurement tool Package Includes: 4 note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.