Strange drill bit

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I found this bit at the dump. It has a tapered shank & is marked "star
- hammer - twist". It has a chisel point, not a cutting lip, so it
clearly does impact cutting & hence (?) is for masonry. But it is not
carbide tipped! It has some rust, so it can't be solid carbide, can it?
So, I guess the question is: is there some steel alloy that is used for
masonry impact drilling?
Thanks,
Bob
Reply to
Bob Engelhardt
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