The Schonstedt magnetic locator can detect metal objects that are made of ferrous materials. So if a magnet can stick to it, this device can find it. But the size of the object will determine the depth by which it can be detected. It won’t be able to find electrical power cables, which are made of aluminum or copper (both of which are non-ferrous materials). But it can find cast iron pipes, property corner markers, steel enclosures, or any other type of hardware that’s made of iron or steel.