This thickening and widening writing clipboard is made of environmentally friendly, non-toxic, high-quality plastic with reasonable hardness and flexibility. Can make the writing more smooth, without any hindrance, look neater stereoscopic, the classic color will never be out of date. Waterproof, dirt-resistant, not easy to break, strong elastic, strong supportability. The metal shelf above is strong, smooth, and rust-free, holding 80 sheets of paper. Rounded edges do not harm the skin. The overall compact, portable, and can be carried in a backpack. Suitable for offices, schools, and companies.