ACCURATE MEASUREMENT AND ZERO SETTING: This digital caliper glides smoothly. Measuring range: 0 -8" / 0-200mm; Accuracy: ± 0.001"/ 0.02mm; Resolution: 0. 0005"/0. 01mm/1/128". At the same time, the smart design allows you to easily reset to zero by pressing a button and start a new measurement at any point on the scale, which is very suitable for differential measurement. UNIT CONVERSION : The 200mm Digital Calipers have a one-key button to quickly switch from inches (inch), millimeters (mm),fractions (F). STAINLESS STEEL MATERIAL: The Unipec caliper is made of high-strength stainless steel and is waterproof and dirt-proof. The service life of this stainless steel digital caliper is longer than that of calipers with plastic or carbon fiber parts. LARGER LCD SCREEN: The 8" digital caliper with 2" LCD screen, which is easy to use and read even under strong sunlight. It will automatically turn off after 5 minutes of non-use to save power. 4 MEASUREMENT MODES: The digital caliper has 4 measurement modes, which can be used to measure inside and outside diameter, depth, and step with two sets of jaws and a probe. Multiple measurement modes can bring more usage scenarios to people, and the measurement process is also very convenient. This digital caliper is made of Stainless steel, making it lightweight and easy to handle. The large LCD display provides clear and easy-to-read measurements, ensuring you get accurate results every time.