JunkMan,
I picked it up at Advance Auto part. You have to look kinda close. It is just a little 3/4" cube with different prongs on all side except one. Then you just use a rachet and an extension. Works well.
Click on Noobs post and you'll see what it looks like there. I was surprise that none of my friends that work on cars a lot more than me had never replace brakes like this. Maybe cause we drive old cars.