Looking at the supplier's prices for those and other items, I suspect they are importers. The most probable place of origin being Pakistan, as they have long been producers of medical and dental instruments. When I was in the trade, Pakistan made instruments, other than those made by outsourced German factories, were a by-word for poor quality steel and bad workmanship. I know the supplier says that the instruments are CE marked, but, I have spoken to some of the manufacturers at trade exhibitions and would not be confident that it meant any more than that the purchaser had asked for instruments with the CE Mark.
Having said that, there is not a lot to go wrong with dental probes. They might bend if made from the wrong sort of steel, but they are not likely to kill you.
Not me and I used to make the tools.