Today up for your consideration we have a unique rare ( I've never seen one) Boat Hole Plug. made of wood no makers marks, it screws in. I was told when you get a hole in your boat you insert this in the hole and screw I in as tight as you can the water expands the wood sealing the hole. It's in excellent condition. Makes a good what is it? And a great conversation piece. A beautiful work of art.