Oversized fan. A lot of toaster ovens already were able to do convection cooking, just need to move more air and provide a basket to call it an air fryer.
As a side note, I highly recommend a good toaster oven to everyone. It heats up so much faster than the normal oven, and when reheating things, it doesn't ruin the texture like a microwave. And I don't have to store separate toaster and air fryer.
I love this so much. The idea of needing to anneal small amounts of metals on a regular enough basis that it’s worth getting a toaster oven to pull double duty is so foreign to me. However knowing that there are people out there for whom that can be a genuine factor when deciding whether or not to buy a toaster oven, fills me with glee.
Mostly "bushcraft" knives. So they are fixed blade and full tang. Nothing special.
I honestly end up modifying knives I've gotten a hold of more than anything. Have one of those Ferrari chef knives I've modified for my own personal use.