In this video I make a small knife for leather work from an old rusty circular saw blade. It was an old blade, without carbide teeth, so the steel was hard and could be heat treated.
The major problem was that the metal warped during heat treating and I tried to straighten it while it was warm, as I've seen them do on Forged in Fire... didn't go so well for me, the blade broke and I had to change the design of the knife.
I used mostly hand tools, which was a challenge. This took a lot longer that it would've been with power tools but it was much more enjoyable overall.
The handle was made from olive wood, repurposing an old cutting board.

00:00 Designing The Knife
00:44 Splitting Wood
01:00 Annealing The Blade
02:14 Shaping The Blade
04:41 Sharpening The Knife
05:02 Heat Treating
05:27 Reshaping The Blade
06:07 Making The Handle
09:24 Final Assembly
10:27 Finishing The Handle
11:00 Testing