Fishing hooks, I’m always surprised how much can go wrong when making such a small object. There are so many variables to consider. The same applies to the underline attached to the hook. Nevertheless, a great way to combine a wide variety of skills to create a nice tool.
I have already seen fishing hooks from the most diverse materials pass by. And often these seemed to me to work only theoretically. People too often forget the influence of water on the brackets they make. Take wood, for example. Dry wood can provide a nice solid hook. But what happens if this wood sucks itself full of water again? What happens to the glue you used? Or with the binding material? How do the materials react to the water among themselves. Is the connection getting stronger or the opposite? Do the fishing hooks have enough mass to sink or is the buoyancy too great? Not to mention the material from the underline.
Fishing hooks are also a good example of tools that you make in bulk. It requires a certain skill to make it in a functional way. In addition, it is often the case that collecting the material for a hook takes almost as much time as for several fishing hooks at the same time.