insert two points with distanse of 25 nanometer

Hy,

I am using SolidWorks 2010 and i insert two points who there distanse are 25 nanometer, and i want that SolidWorks refer  to them as one points (not two) it means that i don't want that solidworks refer to small measure.

how i am doint that?

thanks...

SolidworksSketching