This is a Useless Knife – a deliberately impractical 3D printed object that resembles a knife but cannot be used for cutting. Its shape makes it completely nonfunctional, which is exactly the point. It works well as a desk toy, a joke gift, or a decorative item that adds humor to any space. The model is easy and quick to print, does not require supports, and prints well in common materials such as PLA and PETG.