These exceptional metal formers are great for making smooth radius bends in sheet metal without cutting, heating, or hammering the material. Mount them on your workbench or in a vise and use the shrinker to contract metal to inside curves, and use the stretcher to expand the metal for outside curves.
This home shop model comes with a single body and one set each of shrinker and stretcher jaws. You can change jaws in minutes without tools.