STANDARD BLOCKS
FOR HARDNESS
- ISO 9001, ISO/IEC 17025 -

Since 1952

Reliable Precision, Standard Hardness Blocks

Yamamoto Scientific Tool Laboratory (YSTL), founded in 1952 in Funabashi City, Chiba, was the world's first manufacturer to specialize in standard hardness blocks. Since then, YSTL’s hardness blocks have been used in many countries across Europe, the Americas, Australia, and Asia, thanks to their global reputation for superior quality. As a company serving customers worldwide, we will continue to promote the global expansion of our hardness block business by strengthening international technological collaboration and forging closer partnerships with overseas distributors to broaden our sales network.