Four Times Engraving Values: Features advanced four times Engraving Values for enhanced clarity and intuitive reading. This ensures that measurements are easily readable and precise, reducing the likelihood of errors High-Quality Steel Alloy Measuring Surface: The measuring surface is made from high-quality steel alloy, which provides exceptional durability and precision. The alloy is specifically designed for accurate aperture measurements, ensuring reliable results Chrome-Plated Shell: The shell is chrome-plated, combining aesthetic appeal with practical benefits. The chrome plating not only enhances the tool's appearance but also makes it resistant to wear and corrosion, extending its lifespan Ratchet Lock Knob: Equipped with a ratchet lock knob that maintains a constant measuring force, ensuring consistent and accurate measurements. This feature prevents variation due to uneven pressure, contributing to precise and reliable results Spiral Anti-Skid Treatment: Designed with a spiral anti-skid treatment on the handle, providing a stable and secure grip. This feature minimizes the risk of slipping during use, enhancing measurement accuracy and overall user control