I have a row of nails in a fairly inaccessible position on my verandahs.
They get hit by the sun a lot and eventually rise up out of the deck and I have to bang them down again once every 3 or so years.
Got tired of holding nail punch at an angle and skidding off.
So I made this - It is a concrete nail sandwiched between two bits of black bar.
Works spectacularly well.