Wrap around iron is typically thought of as deeply buried, odd shaped, pieces of highly ferrous material that will sometimes appear as a "good target" in that it can provide high conductive TID numbers, in combination with very low or very high FE numbers. Iron has a tendency to oxidize when underground, and "leach" iron oxide into the surrounding area. In many instances, you can identify those pieces of iron by using a combination of your detect mode and Pinpoint. If you locate the target in detect mode and visualize where it is located in relation to a leaf, a clod of dirt or a clump of grass..... then repeat the process in the Pinpoint mode....... if the location of "both" targets is not the same, it is usually iron. However if the target "remains" in the same location, it is generally not iron. Some detectorists would prefer to reject those extremely high FE/CO parameters to reduce the audio signals from the "wrap around" iron. As a word of caution.... don't reject more high CO properties than necessary as BIG silver and copper targets can have very high CO numbers. A combination of FE line 35 and 01/50 is typically the only "wrap around" parameters that I reject when coin hunting. JMHO HH Randy