Plaster board, made of EVA material, is a tool used in construction to apply, level, and decorate materials such as plaster, gypsum, putty, etc. It usually consists of a flat EVA board surface and a handle, which is often made of wood or plastic to provide a comfortable grip. In plastering work on walls or ceilings, craftsmen use plastering boards to evenly apply plaster to the surface, and then finely trim the edges or tips of the boards to achieve a smooth or specific texture effect.