Yamamoto Hardness Test Blocks

Yamamoto Scientific Tool Laboratory (YSTL) was established in 1952 as the world’s first manufacturer specializing in standards hardness blocks in Funabashi city, Chiba. Since then, YSTL’s hardness blocks are used in a wide range of countries throughout Europe, America, Australia, and Asia because of their global reputation for superior quality.

1. Hardness uniformity meeting world’s highest standards,
2. Universal reference values based on JIS/ISO standards for international acceptance,
3. Highly stable and reliable hardness values, as well as their traceability to international standards.