Hi
I bought some "Thunderbolt" M8 Torx concrete fixing screws.
These are to upgrade from plastic plugs. I am hoping to get a
considerable increase in strength of fixing.

What do I use to fit them. Currently I have nothing to do a trial on,
but the suggestion that an impact driver is needed seems a little odd.
I would have assumed that the impact would just shear the newly cut
concrete thread.

Is a normal screwdriver practical, I notice Lidl have a pneumatic
impact driver on sale currently, would it be worth getting one?

Regards

AB