[HIGH DURABILITY] Crafted from high-grade S50C steel with heat treatment for rust , wear , and stability, ensuring a long lifespan. [PRECISION GROUND EDGE] Boasts an impressive accuracy of +/- 0.001 inch for meticulous inspections, providing true precision in detecting flaws on cylinder heads and engine blocks. [POWERFUL FUNCTION] Designed to check flatness and straightness on various components including engine blocks, flywheels, and cam covers, offering a reliable method for flaw detection. [EASY TO STORE] Includes a protective blow molded box for convenient storage and transportation, keeping the tool clean, organized, and ready for professional use. [PRACTICAL TOOL] Enhances inspection accuracy and quality control measures, promoting equipment longevity in your routine maintenance., Manufacturer: Jelquix