If you've ever removed your HE's and had the experience of breaking or stripping/pulling your head studs you know its very frustrating

To repair, depending on the circumstances, you can pull the motor, then head and go about fixing.
But most times you need to do it in the car, and for those of us w/o access to a lift! It often means doing it on your back

After getting out a broken stud you are often left with the task of re-drilling the alum. head *often with hand tools & on your back* this can be challenging to get right ...

Here is a little tool I found helpful and Ive got 3 available.

$9.14 + $5 ship

Click to view attachment

Hey Rich, did these ever sell?

The reason I ask is that I have a bunch of old exhaust systems I was going to scrap. After seeing these, thought I'd cut off the ends and make several of them, keep a couple and sell the remainder (if people need them)

Nah, although I didnt put any real effort in promoting.
I will say it worked remarkably well for ensuring a "straight" redrill & tap on the head when working on it in-car as described!

good tool

You've marketed it wrong. It should be a "Featured Homemade Tool"