SPI Hardness Testing File Set

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SPI Hardness Testing File Set

Features:

  • Practical, inexpensive method to quickly determine approx. hardness of heat treated work pieces and materials.
  • Indispensable for every machinist and heat treater.
  • Handy, color coded set of 6 testing files covers nominal hardness from 40 RC to 65 RC in increments of 5 RC.
  • Special curved design for easy access in hard to reach places.