What is that a picture of-- the underside of a sink? Are you referring to the two holes? If so, normally a faucet set would go into holes in a sink, and the fasteners would come with the faucet set.
What is the hole diameter?
What is the hole spacing (center to center, which is the same as the distance between left sides of the holes)?
Are there just two such holes?
If you are referring to the little protrusions more in the foreground, you need a sharper picture that zooms in on those. I suggest that you use a digital camera, in macro mode (tulip icon) to shoot the new picture. The cell phone camera does not seem to do a good job on this.