World's Largest Drill Bit Is Pretty Big, I Guess

The world's largest drill bit was put to use last month boring a subway tunnel in Leipzig, Germany. This is it. As you can see it's relatively large. Not huge, but pretty big. For a drill bit. Now if it was a Reuben sandwich, that would be impressive. And filling. Can you imagine the amount of sauerkraut required for a sandwich that big? I'm thinking several cans at least. I'm also thinking about making one. Who's with me? You bring the ingredients, and I'll bring an appetite and my "kiss the cook but don't touch the buns" apron.

A close up picture of the bit after the jump.

Train-Sized Drill Eats Through Earth and Concrete [io9]

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