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Rock bit

What is it?

Is a rock bit it can penetrate through soft rocks and compact layers of soil
Make sure you grind from inside so that the sharpness will be to the out side  

Good Things

  • Is that you can drill through soft rock and compact layer of soil

Bad Things

  • By using this type of rock bit you cannot pass the very hard rock like granite

Your Ideas

Write any untested improvements that could be made

Click here to draw your ideas