The Leeb hardness tester has the following significant advantages in the machine tool guide hardness test: 1. The instrument performance is stable and the indication value is accurate and accurate. 2. The instrument operation is fast and free from the limitation of the field environment and the shape of the workpiece. 3. The instrument is compact and easy to carry. On-site printing and recording function 4. The Leeb hardness tester can be configured with various impact devices suitable for the test range of various materials.