Items used for leather-work From top and left to right: A leather palm pad, used to push the needle through the leather if it is a tight fit. I did not need to use this when making this Hammer Stall; an awl, beeswax for waxing the linen thread; needle, and linen thread.
Further research has shown that "Boot" may not be a period term. Hammer stall or hammer cap or even in one case the term "Thumb stall" was used. The term "Frizzen" is apparently a 19th century term derived from a similar German word.
On this one I placed the suspension tab on the back half of the stall because I had more of that leather, I was using scraps. But the tab can go on the back or the front half.
Here you can see a hammer stall I made some years ago for my fusil. The stall is in place on the hammer or steel.