Material:metal Feature: Designed with Imperial and Metric dual mode reading, you can read it in your preferred way within two measuring modes, inch and milimeter scale. No extra tool required and can significantly save your time. Duarable and long-lasting manual caliper with smooth slide, no grittiness. It's convenient to use by one hand without any extra support. Instant reading you will get! Size: Overall 29.5x9cm,Measure to 20cm Long