Here’s a marking knife I made yesterday. After seeing all of the beautiful ones made for the marking tool swap, I had to have one for myself.
I started out with an old tablesaw blade, and after about 2 hours of sawing, filing, and polishing, I had a useable blade. I turned up a small handle out of some mahogany, and found a bit of copper pipe which I turned and polished in a drill chuck to use as a ferrule. Soon after, with a bit of crazy glue and a good honing the knife was ready to go.