Die Grinder Bits for Metal, Carbide Rotary Burr Grinding ...
Syndent die grinder bits for metal are manufactured by micro-fine tungsten carbide raw material. Tungsten carbide is a special hard material. The hardness of it is HRA 90.5. That determines you can use Syndent die grinder bits to work on very hard metal. The hardness can be up to HRC 70.
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