Every game needs terrain. Shatterpoint has some specific ideas about it, and comes with a good amount in the box, but there are also a couple of separate terrain kits. These rocks are from the Take Cover kit.
It includes a pair of large rocks, and a pair of much smaller rocks. They are identical, as the sprue is repeated.
I tried to paint them in a fairly neutral way, so it could belong on a lot of different types of boards; a forest, a desert, a city, etc.