This is a complete set of pens used by John Ritter's character in the horror anthology Terror Tract. There were three styles of pens used. One was a normal functional pen that John could write with. Another was an enlarged non functioning version that was so the pen could be picked up better on camera. Then the last and my personal favorite pen was his retractable kill pen. This one had a blood tube attached to it so when John stabs the husband in the neck at the end blood could spray out.
