This is a simple project that anyone with a dremel can make.
I wanted to carve a traditional wooden spoon but I had trouble carving it with a chisel. So I decided to make myself a hook knife.
But, since I don't have a forge or a proper way to heat treat steel, I cheated a little by making it from an old wrench. This way the steel is already in the right shape for a spoon knife and properly hardened.
The whole project is basically sharpening the ring of the spanner, and this can be done using a rotary tool, like a dremel. As handle I've used an old file handle I've picked a while back at the flea market.