Feature: 1. Stainless Steel + High Carbon Steel: High quality stainless steel, high carbon steel material, wear resistant, long life 2. Round Headcrotter: With the round head scribe cut clean, fluent line, and adopts top level exquisite craft 3. Slider Can Be Fixed: Slider of height ruler can be fixed, locked, thumb fine tuning ring for fine measurement 4. Accurate Reading: High level performance is stable and reliable, the reading is accurate, used for measuring various heights 5. Stable Substrate: This high level feature has a stable substrate, easy to position, and the accuracy is 0.02mm Specification: Item Type: Vernier Height Gauge Material: Stainless Steel, High Carbon Steel Range: Approx. 300mm / 11.81in Accuracy: 0.02mm. Package List: 1 x Height Ruler 1 x Plastic Box Note: Do not force the bumps to cause the reading unprecise and even irreversible damage