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