The Sealey AK9638D Digital External Micrometer is a precision measuring instrument designed for accurate external measurements in engineering, metalworking and precision manufacturing applications. This digital micrometer features a spring-loaded satin chrome pin and provides reliable measurements across a 0-12.7mm (0-0.5") range with exceptional accuracy of ±0.03mm (0.001"). The easy-to-read LCD digital display simplifies measurement reading and includes a convenient auto-off feature to preserve battery life. The unit operates on a single LR44 battery (supplied) and offers the flexibility to switch between metric and imperial units, making it suitable for diverse measurement requirements. A standout feature is the ability to zero the display in any position, enabling relative and tolerance readings. This functionality is particularly valuable for comparative measurements and quality control applications where tradespeople need to check dimensions against a reference standard. The compact 0.15kg unit offers fine graduation of 0.01mm (0.0005") for precise measurement work. Features and Benefits: • Spring-loaded satin chrome pin for smooth operation and durability • Switchable metric/imperial display for versatile measurement needs • Zero function in any position enables relative and tolerance readings • Auto-off feature extends battery life during extended use • Easy-to-read LCD display eliminates parallax errors Specifications: • Accuracy: ±0.03mm(0.001") • Battery: 1 x LR44 (supplied) • Brand: Sealey • Graduation: 0.01mm(0.0005") • Nett Weight: 0.15kg • Range: 0-12.7mm(0-0.5")