I found this while walking on a private beach near Pirates Cove in Grapeview, WA at low tide. I first noticed the shape and that it was really heavy. The other half was close by. A magnet does stick on it. The ends have an odd shape, like it fit into something else. It was next to a huge rock that is over 6 ft tall and wide. Any idea's on what it might be? I know that long ago the settlers did fishing and logging and there were small ferry boats that traveled the area. Thank you.