The leather tools remind me of a tracing wheel for sewing cloth.
But the tracing wheel for fabric doesn't have sharp teeth.
You lay out the fabric and pick a color of tracing paper ( has a colored wax coating)
Layout your pattern sheets and pin them to the fabric, with the tracing paper between the pattern paper and the fabric to be cut and sewn.
With that done, you roll the little wheel tool around on the lines of the pattern paper and press hard enough to transfer the "wax" and create lines on the fabric.
With that done, un-pin things now you follow the transferred lines to cut your fabric to shape.
A few more details involved, but that's the gist of it.
My father died when I was young. Mom knew a lot things from growing up on a farm and having some factory jobs also.
Mom taught me to change switch/sockets of table lamps, how to solder. we did plumbing (including drain cleanouts) when needed.
Mom and Grandma were serious seamstresses too.
So you better believe I got to see the inseam of a pair of pants be repaired.
..
this why you need to pull up your britches before you climb a ladder of step up into a truck, etc.
And yes there was a bit of cast iron cooking in there too!
During the late 70's ~mid-late 80's I realized a lot of guys who worked leather, had learned the craft while as a "Guest" in the "state house".
Saddlebags, tool pouches, chaps, vests... I saw some dang nice work from time to time.
Those are lather working tools, specifically the roller ends are stich markers that you trace along a pattern for a certain # stitch count. Ive also seen them used to transfer a chalk pattern to a soft material or fabric.
The larger wheel might be a perf cutter for leather as it kind-a looks sharpened, but I have never seen such an animal nor can I think of a reason to perf cut leather......just a bigger space stich count IMO