high grade single flute brazed gun drill bit widely used for deep hole drilling , with high precision ,high slide.
![](https://s.alicdn.com/@sc02/kf/He00075a499c245d8a33ebe292822e8722/222132919/He00075a499c245d8a33ebe292822e8722.jpg?quality=close)
material (>900N/M m2/)
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material(<900N/M m2/)
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stainless steel and related
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alloyed steel
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structral steel
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stainless steel 316
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tempered steel
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high carbon low alloy
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tool steel
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machine steel
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tools steel
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easy processible
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