EXTRA BATTERIES BATTERY COVER: This digital caliper comes with 3 batteries, ensuring you're always prepared. Additionally, it includes an extra battery cover to enhance durability and user experience. STAINLESS STEEL CONSTRUCTION: Made from high-strength stainless steel, this digital caliper measuring tool is waterproof and dustproof, offering greater durability compared to those with plastic or carbon fiber components. PRECISE MEASUREMENT ZERO SETTING: The calipers slides smoothly with a measurement range of 0-6 inches (0-150mm), an accuracy of 0.001 inches (0.02mm), and a resolution of 0.0005 inches (0.01mm). Its smart design allows easy zero resetting at any point on the scale, ideal for differential measurements. FOUR MEASUREMENT MODES: The digital caliper 6 inch offers four measurement modes for internal and external diameters, depth, and step measurements. This versatility makes it suitable for a wide range of applications, simplifying the measurement process. THREE UNIT CONVERSIONS LARGE LCD DISPLAY: Features a one-button switch for quick conversion between inches, fractions, and millimeters. The large LCD screen is easy to read even in bright sunlight and automatically shuts off after 5 minutes of inactivity to save power. WIDELY APPLICABLE: Compared to ordinary rulers, this stainless steel caliper measures not just length, but also diameter and depth, making it suitable for circular and cylindrical objects. Its favored by professionals and hobbyists alike, including jewelers, carpenters, mechanics, DIY enthusiasts, and auto mechanics.This digital caliper is an ideal choice for both professional and amateur applications due to its versatility, high precision, and robust design.