Good leeb hardness tester has the following features:

1. Impact device is interchangeable. The main unit of leeb hardness tester can be equipped with seven different impact devices. Several impact devices of the same kind can be installed in one unit.
2. The plug of impact device can be replaced. The plug of the same kind of impact device can be interchangeable and test value will not be influenced.
3. Leeb hardness tester does not have adjustability. When the test value is not precise due to the wear to ball head, it should be solved by replacing the ball head.
4. The error of leeb hardness tester can meet the standard requirement in the whole range of hardness.