Material: these Clip Pen Holders are made of metal steel, solid, durable, not easy to rust, and can be used for a long time. The package contains two and three hole design pocket clip holders. You can use them useaccording to your needsAdjustable ring: The spring expands to accommodate pens and pens of different sizes ranging from 7-18mm. Spring pin fits most pens and pencils Convenient to carry: the pocket clip can be fixed on the clipboard and the binder clip, and is equipped with a pen clip, no need to worry about losing the pen and pencil, use the pen anytime, anywhere Large and practical: these pen holders can be used for notebooks, books, sketchbooks, card holders, diaries, calendars and diaries. They can also serve as bookmarks for you A Gift of Hope: These pen sets are perfect for students, teachers, letter carriers, doctors, nurses, pilots and other professionals. They can be used at home, school or in the office, and are suitablealso perfect for those who need to carry a pen at all times Each Clip Pen Holder is made of metallic steel and has a metallic sheen 2 Style pen holders, 2 for each, can meet your daily needs These Metal Clip Pens are small, strong and lightweight, making them very suitable for doctors, nurses and pilots The pen holder is great for use on laptops and notepads to help you keep things organized