Suitable Size: Includes 4 different ranges (0-25mm, 25-50mm, 50-75mm, 75-100mm) for your selection. Precision Tools: Boasting extremely high precision of 0.01mm, ensuring accurate readings every time. Excellent Quality Outside Micrometer: Crafted from highly durable carbide. Note: Please verify calibration before use. 0-100mm Outside Micrometer - Precision Instruments Measuring Range: 0-25mm / 25-50mm / 50-75mm / 75-100mm Precision: 0.01mm High-Quality Materials: Constructed from highly durable carbide. Instructions: 1. Wipe the test object and handle the micrometer carefully; 2. Loosen the micrometer's locking device, calibrate the zero position, and turn the knob so that the distance between the measuring tip and the micrometer screw is slightly larger than the measured object; 3. Hold the micrometer ruler with one hand, place the object to be measured between the tip and the end of the micrometer screw, and turn the knob with the other hand. When the screw is close to the object, turn the force measuring device until you hear a click. Gently turn 0.5~1 turn; 4. Tighten the locking device and you can read it. Maintenance Instructions: 1) Handle with care 2) Wipe the measuring tip and the differential cylinder to avoid the influence of chips and dust 3) Separate the measuring tip and tighten the fixing screws to prevent rust due to long-term contact. 4) Do not place them in a place with high humidity and large temperature changes 5) It is forbidden to use a micrometer to measure moving or high-temperature objects 6) It is strictly forbidden to use a micrometer as a caliper or a hammer to strike other objects. Note: Due to differences in lighting and screen settings, the product color may be slightly different from the picture. Since manual measurement is different, please allow slight size differences. Delivery Quantity: A set of 4 pieces