Sufficient quantity: Each package contains 3 pieces of metal pen holder, small size, light weight, easy to carry and store, the number is enough to meet the needs of users. Adjustable ring: the diameter of the spring ring can be expanded from 7 mm to 18 mm;You can use them to hold almost any size pen or pencil with an effective pen holder. High quality: The pen holder is made of manganese steel, durable, flexible and durable, long service life, so it is not easy to rust and corrosion. Portable: Pen clips attach to your laptop on the top or side, and they are lightweight, easy to carry and store, and not easy to lose. Scope of application: The pen can be used for whiteboard, refrigerator, filing cabinet, notebook, bulletin board, map and other places, and even can be very good to help people with shopping lists, pens, pencils and so on.