1. Marker pen: a pen used for writing and identification. The tip is made of polymer materials such as plastic and fiber. It is used to mark paper, wood, metal, plastic, enameled ceramics and other materials. Pens and markers are divided into oil-based markers and water-based markers. Water-based markers can be written on smooth surfaces or whiteboards and can be wiped off with a rag. Words written by oil-based markers cannot be erased;

2. Pencil: A hand-held pen and tool used for writing and drawing on paper. The pencil is made of graphite as the core and a wooden rod as the outer cladding. The end of the pencil has an eraser. The pencil The handwriting is easily erased.