Step 2: What you need
1 round tube-type disposable pen
1 scrap of 24 gauge steel wire
1 stick from a wooden cotton swab
A small drill bit
A pair of pliers
An exacto knife
If you had a complete pen, you could probably use the ink tube in place of the wooden cotton swab. It might even work better, because it would have reduced friction compared to a cotton swab. But I used what I had lying around.