Flimsy tool
From Nookipedia, the Animal Crossing wiki
Flimsy tools are the lowsest rank in Animal crossing new horizions. They break easily, for example, A flimsy net Will break after 15 catches. None of them are customizeable, making the repair tool trick impossible. These are the tools you are stuck with in the beginning of Animal crossing new horizions. However once Timmy and Tommy have opened book's cranny, you can but a tool pack containing better tools.
