The precision manual (surface) Rockwell hardness tester DigiRock H series, DigiRock HR1/HSI adopts a Rockwell dial with 0.5HR indication division, which improves the accuracy of the instrument's indication reading; DigiRock HR1/HS uses a metal variable load handwheel, which improves the service life of the entire instrument; The DigiRock HR1/HIS body is constructed with 10MM cast iron, which is sturdy, durable, and suitable for various harsh environments; DigiRock HR1/HIS uses an oil pump buffer to adjust the loading speed of the test force; DigiRock HR1/HIS optional indenter protection device can effectively improve the service life of the indenter.