1. Complete Protection Set Your investment is safeguarded with the included durable storage box that prevents damage and loss. The compact Box/Cover allows for easy organization, portability and quick access, making it for mobile technicians and workshop storage. 2. Ultra Precision Measurement The outside micrometer features a accuracy spindle and ultra hard tungsten carbide anvil, ensuring measurements within ±0.0001in. The ratchet pin handle provides consistent force application for reliable, repeatable results, making it ideal for precision engineering tasks. 3. User Friendly Design The micrometer includes a convenient ratchet stop mechanism for uniform pressure application, eliminating measurement errors. Its ergonomic frame and smooth rotating thimble ensure comfortable operation during extended use periods. 4. Versatile Measuring Tool This multifunctional instrument serves as both an outer diameter micrometer and thickness gauge. for measuring length, diameter and thickness of various materials with its wide 0 1in range and fine 0.0001in graduation scale.