First, I might not be using correct terms because I am a beginner to the craft. I've got a bunch of tools (given to me) but only a little knowledge. One of the tools that I did NOT get in the generous gift from my brother, an adjustable stitching groover like the one pictured on this web page: My link.
After re-reading Stohlman's The Art of Hand Sewing Leather I decided I needed one. What I received was in a package with a Tandy label in the plastic bag (but I didn't buy from Tandy directly)