A cheap and easy way to improve the Fisher AG-7

I’ve long had a love-hate affair with my my Fisher Space Pen AG-7. It’s one of the most practical, usable, and durable metal ball point pens out there, which makes it a great pen to have around. You can read my Fisher AG-7 Space Pen review here.

For long writing sessions, though, the grooves at the grip of the pen get a little uncomfortable. It’s also a smidge thin.

Today I discovered a simple way to fix both problems. Heat shrink tubing. Either 3/8″ or 1/2″ tubing will work, with the former being tighter at the pointy end of the pen, but the latter ending up a little thicker and softer. You can get heat shrink tubing at the hardware store, in the electrical section – a few dollars at most.

The pen ends up with a nice smooth slightly grippy surface that is skin-friendly, and the pen ends up nearly a 1/16″ bigger in diameter, so it’s girth improves a bit. It also makes the pen more pocket friendly with other items, like my iPhone. So far I’m loving it.

And, if I ever discover I want to go back to the regular tubing free pen, a simple cut with a razor blade has it off in a few seconds with no residue.

A few tips:

  • You’ll need a heat source to do the shrinking. A heat gun is ideal, and handy for lots of other uses. A stove burner is nearly as good.
  • Expect to do it more than once. Getting the tubing positioned and shrunk evenly is an easy skill to master, but you may not get it on your first try.
  • Some places may have the tubing in colors other than black, so it may pay to look around.

One thought on “A cheap and easy way to improve the Fisher AG-7

  1. My wife taught me a neat trick to solve the same problem. She hates to throw anything away and her pens are also a smidge thin. I use a Pilot G-2 07 everyday and consequently, once a month, I have an empty pen for her to recycle. She removes the black rubbery finger grip with a pair of soft pliers. She then slides the black grip over one of her thin pens, so that she can write more comfortably.


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