MikeWhy wrote:

So where do you suppose the package of replacement blades are?

For years handed out small screwdrivers with a magnet in one end.

Would caution the person receiving the screwdriver that it had a set
of invisible legs which the screwdriver used to run away and hide when
you weren't looking.

My bet is those blades came equipped with a set of those invisible
legs.

Lew