BOVZOR 30pcs Surface Roughness Comparator Set, Surface Finish Comparators Ra0.05-12.5mm with 5X Magnifying Glass Machinists & QC Inspectors for Lathe Machinery Manufactur Teach

["【Precision Standard for Multi-Process Inspection】 This Surface Roughness Comparator Set serves as a definitive Tactile Roughness Standard and Visual Surface Comparator. It provides 30 Roughness Comparison Samples covering a wide Ra0.05-12.5 Roughness Comparator range, offering a reliable replacement for workshop masters and QC Inspection Roughness Comparator tasks. Instantly compare and verify the Surface Finish Standards of parts from turning, milling, grinding, and more.","【Engineered for Durability & Long-Term Accuracy】 Constructed from Hardened Steel and Carbon Steel Surface Roughness Standards, each Roughness Comparison Block is built to last. The Durable Surface Roughness Comparator Kit features a protective oil film, ensuring each Metal Roughness Sample Block remains stable, wear-resistant, and maintains its precision through repeated use in any Machining Surface Comparator application.","【Intuitive Tool for Pros & Students Alike】 Designed for clarity and ease, this Portable Roughness Comparator Set is the ultimate Visual Surface Texture Comparator. Blocks are permanently marked with their Ra value and arranged in order, making Roughness Comparison Samples easy to identify. It’s an indispensable Engineering Teaching Roughness Comparator and a quick-reference Machinist Surface Roughness Comparison Kit for the workshop bench.","【Universal Application Across Manufacturing】 This comprehensive set is the essential Comparator for Machinery Manufacturing. It's ideal for Mechanical Inspection Roughness Comparator duties, instrument calibration, and quality assurance on the shop floor. Whether you're working with a Surface Roughness Comparator for Lathe, mill, or grinder, this kit provides the Surface Profile Roughness Comparator reference needed to ensure every part meets spec.","【Complete Kit for Immediate Use】 You will receive a complete 30pcs Surface Roughness Standards set housed in a sturdy protective case. This organized Roughness Sample Set includes all common grades, functioning as both a Microfinish Comparator and a Surface Texture Comparator. BOVZOR's kit offers professional-grade Surface Finish Comparators at an exceptional value, ready to tackle your Manufacturing Process Roughness Comparator challenges right out of the box."]