Several ideas I had using left over cut-offs from other projects. Left pen is a 3006 pocket pen, center pen is a 3006 detachable on a black necklace cord, and right is a .308 keychain. All use Mini-Pen refills and 7mm transmissions. Pretty simple to make, and since I don't always have a shirt pocket to carry a pen in, the pocket pen is always with me when I need it. Any comments are welcome as I'm always trying to improve. Thanks for looking.