Features: 1. As long as you have this product, plaything's measurement is no longer a trouble! 2. The product is made of high-quality brass, with good wear resistance, practical and durable. 3. Double-scale measurement, and when the caliper is closed, the vertical line below is aligned with the number "0" in the center of the ruler, so the preceding blank does not affect the accuracy of the measurement. 4. The product uses a laser-scale, allowing you to get the data accurately. 5. After-sale Service: If you have any questions, please contact us immediately and we will help you solve it as soon as possible. Specifications: Weight: 36g Materials:Brass Measuring range: 0-80mm/0-3.25in Rangesof Application:Jewelry, olive pits, bodhi-seeds and other small objects. includes: 1 *Caliper