[Portable Pen Holder with Spring Ring] If you frequently need a pen as a doctor, nurse, pilot, police officer, nurse, healthcare professional, or architect, try our portable pen holder. With the clip on your shirt or pocket, you can quickly find your pens without wasting time. Musicians can install the pen holder on a music stand or sketchpad. The flexible spring ring can hold all types of pens. [5 Pieces Horizontal and 5 Pieces Vertical Pen Holders] We offer two types of pen holders (5 pieces horizontal and 5 pieces vertical) so you can place the pen holder horizontally or vertically on your clipboard to meet your needs. [Pen Holder] The pen holder can be attached to anything you need for your work, such as a clipboard, ID card, folder, music stand, songbook, planner, calendar, sketchpad, diary, shopping list, sketchpad, a jacket, a uniform, and a bag, etc. [Your Makeup Brush Holder] Messy makeup tables with all makeup brushes lying around are a tedious situation. Why not try our metal pen clip to organize them? This exquisite little pen clip is a great solution for creating a comfortable cosmetic experience. Practical Size: The spring ring diameter can be expanded from 7 mm to 18 mm. The pen holder can hold pens and pencils of all sizes. It is mainly attached to panels and boards with a thickness between 1 mm and 2 mm.