Traveler's Company Pen Holder
These pen holders can be attached to your Traveler's Notebook to give you a place to keep your pens.
It attaches to the leather cover of your Traveler's Notebook with a metal clip, and the leather holder can hold writing instruments up to 12mm in diameter. It can be attached to both regular-size and passport-size pens, making it perfect for those who want to always carry their Traveler's Notebook and have a pen to hand.