Ramset is a brand name for equipment generically referred to as a “powder actuated” hammer or “velocity tool”
They are used to fasten hardened nails into concrete with something on the order of a .22 cartridge.
As Kleenex has become an all purpose term for tissue; Ramset has become an all purpose term for this class of equipment.
Until the other day I was unaware velocity tools could be used to make holes as well as fasten nails into concrete.
What kind of holes you ask?
Boy howdy, try holes in really thick steel, such as, um, railroad track. No kidding, see for yourself.
I know not what size cartridge they use to do this, but I doubt it is a .22!