It is made up of acrylic which is durable plastic. The sturdy stainless steel metal clip with with a strong spring closure and rubberized corners can hold 80-100 sheets of regular paper. This pack of 1 board have imprinted rulers on a single side with measurements in imperial and metric systems. The rubberized clip corners ensure a secure grip. This unbreakable acrylic plastic letter pad is ideal for office, exam, students, teachers, coaches, sales, utility, home, regular use, filling surveys, drawing, writing, and industrial professional use. This board is equipped with a clip on top, which does not require to be punched. You will be able to give their exam effectively and conveniently with this writing pad due to its smooth surface, Can be used for any purpose, exam or drawing or writing or office use.