Various types of setting tools. So it is hard to describe how yours will actually function. Basically they pull the inside nut part of the anchor tight to expand the anchor in place. The same thing can normally be done with tightening of the anchor screw after the anchor is in put in place this expands it and "sets" it.
hope I was of some help. Is their a manufactures name? they may have detailed instructions on a web site or something.