★ Precision Calibration: This exterior roughness comparison sample block features 30 meticulously calibrated samples, providing a comprehensive range from Ra0.05 to 12.5 mm
★ Standard Stereotype: The notebook sample block includes standards for the six most important processing methods, covering popular "AA" values, a wide range of for surface finishes can be assessed
★ High Quality Materials: Crafted with high quality materials, this roughness sample block is built to withstand frequent use in industrial environments. The composite bag fixing design protects the samples
★ Facilitate Comparison: Designed as a compact notebook style block, this tool allows for quick and easy visual or microscopic comparison. Its portable size (approximately 6 x 3 x 3/8 inch) makes it suitable for both workshop and on site inspections
★ Multifunctional Applications: Perfect for checking the smoothness of mechanical workpieces across six crucial processing methods: turning, end milling, flat milling, exterior grinding, external grinding, and polishing