1. precision outside micrometer: Lightscaled, clear numerical scale, outside micrometer measuring range is 025mm, graduation value is 1m, accuracy is 0.002mm, precise measurement, easy operation, capable of accurately measuring 19.999mm, ensuring accurate measurement. 2. Upgraded large digital display: definition LCD display, lens surface, scratchresistant and wearresistant, clearer reading. Equipped with a plastic packaging box, easy to store and carry, and can prevent damage to the micrometer. 3. Durable: The largest measuring surface is made of hardness tungsten steel probe, alloy inlaid hardness tungsten steel head, smooth cut surface, delicate workmanship, precision right angle, antidamage and drop resistance, delicate workmanship, ensuring the service life of the micrometer. 4. Easy to use: Ratchet constant force control mechanism, stable measurement, accurate and reliable, ensuring constant rotation force, and preventing measurement errors caused by excessive force.