【6 Machining Standards】Includes 30 precision samples covering turning, end milling, flat milling, grinding, cylindrical grinding, and polishing processes with AA values and metric Ra equivalents for comprehensive comparison.
【Visual & Tactile Inspection】Each sample provides true reproduction of machined finish, allowing both visual comparison and tactile feel assessment for accurate roughness evaluation without equipment.
【Portable Compact Design】Wallet-style case measures 6x3x0.375 inches (15x7.6x1 cm) with 30 samples securely housed, weighing only 14 oz (400g) for easy portability to job sites and quality control stations.
【Standard Compliance】Manufactured to meet S.A.E specifications and industry standards, with all samples calibrated using arithmetic mean (Ra) measurements for reliable and consistent comparison results.
【Immediate Practical Use】Enables quick roughness checks by direct comparison with workpiece , for machine operators, quality inspectors, and manufacturing engineers needing finish verification.