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What are these?


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Yeah, not a lot of monetary value there. It's common to grind bits for special jobs. Cutting snap ring grooves, threads, etc. If you have any that look like they have a small piece of metal brazed on the end, those are carbide bits. They have a little more value. Carbide bits cut better and stay sharp longer, but it takes special wheels to sharpen them.

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I prefer the cobalt tool steel bits for aluminum work vs carbide, you can achieve a much better finish. I use them all the time for my lathe and mill. The two you posted pictures of are tool stock that has been ground by the user. Not sure what the value would be unless I could see all of what you have, trying to sell them?

 

-Brandon

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