Here is the one I use most of the time notching. The wood is an oak dowel from the hardware store. The copper cap is the end off a plumbing device used as an air cushion in plumbing water lines. The nail is a horseshoe nail. The dowel and the copper cap are the same size, so I had to trim the dowell down to fit inside the copper. A piece of masking tape keeps it together. This thing is very durable.