Functional: This caliper is ideal for basic demonstrations of the caliper measurement process for students in the education industry. At the same time, it also meets the needs of industrial measurement, and can measure data such as depth and height very accurately. Material: This product is made of high-carbon steel and is very durable. It is high hardness and wear-resistant, suitable for a variety of environments. Accuracy: The scale is engraved by precision equipment, which is much more accurate and has less error than traditional products. Measuring range from 0 to 150 mm, which can perfectly meet the measurement needs of the laboratory Measurement unit: The product scale includes two main measurement units, metric and imperial, which comply with international standards and can meet different needs Accessories: An extra deep depth gauge is added to the back of the product to measure corners that are not normally tactile, making the product versatile