Industrial Drill Bits? Ebay

[Jonm]

https://www.ebay.co.uk/itm/22506975...RU&osub=-1~1&crd=20220712012542&segname=11021
I have no idea what these are and neither does the seller. So I have no idea if they are a bargain.

 

[Hutzul]

https://www.ebay.co.uk/itm/22506975...RU&osub=-1~1&crd=20220712012542&segname=11021
I have no idea what these are and neither does the seller. So I have no idea if they are a bargain.

They look like Industrial mining drill bits to me.
Fit them on a long shaft to drill deep holes prior to blasting with explosive of choice.