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  • Material : Special Version of SNCM+V alloy steel
  • Hardness : Rockwell "C" Scale 55-60 degree
  • Accuracy : Most strict standard for accuracy in across flats and corners enabling precise fitting to the hole of fasteners to achieve a remarkable resistance against abrasion
  • Finish of Surface :Chamfered both ends permit easy fitting to the fasteners' hole and marvelous feeling of touch
  • Hard-Chrome Plating : The best plating for hex key wrench is applied to keep strict accuracy , powerful rust proof and beautiful appearance