I’ve wanted a few of these ever since I finished my bench. I just always had a hard time justifying the cost. A short while ago I was working on my bench and really could have used these, so they moved up in my to-do list.
They are made out of 5/8” hardened rods. These rods where part of concrete forms many many years ago. I cut the rod with a circular saw with a metal cut off wheel. (I have a horizontal metal bandsaw, but these rods take the teeth off the blades) The part that makes contact with the wood is a piece of flat stock I also had laying around.
Now, I haven’t welded anything in some time, and the only thing I have for a welder is an old mig welder I believe came from Harbor Freight probably 25 years ago. I have converted it to just a wire feed using gas-less flux-core wire after the gas lines started leaking. I can not longer find the right size tips, and the nozzle cone is remade from a piece of cooper pipe with a 5/8 nut drove in it. It still works however, and I could even tell on the second hold down I started getting back into the rhythm.
It took some grinding and re welding a couple of times, but that was expected. A coat of black paint to finish them off, and another addition to my shop complete.
-- Master hand plane hoarder. - http://timetestedtools.net