1. Flat head to measure soft flat plate, such as paper, wood board, jewelry, etc. 2. Measuring the wall thickness of hollow tubes and round tubes with a curved tip 3. The pointed tip measures hard plates, such as steel plates, iron plates, etc. 4. The scale is clear and the reading is intuitive 5. Measuring range: 0-10mm, 0-20mm, 0-30mm 6. Measurement accuracy: 0.1mm 7. Display mode: pointer 8. Material: alloy