This kit includes all the pieces of the jacket put together to form the garment along with, thread, wax, six buttons, needle, and instructions. You will need to finish the pockets, set the sleeve linings, close the lining at the neck, work the button holes, and sew on the buttons. You may choose to hand topstitch, machine topstitch, or not topstitch the jacket at all.
You have a choice of a jacket with one piece sleeves, or a jacket with two piece sleeves. You may also choose to add collar trim and/or epaulets. Various linings for the body of the jacket are available.
A garment blank kit is great time-saver and it allows you to make sure have the right size before investing a great deal of work.
"Commutation jacket" is a term used to describe a jacket that was not issued through the government. They could be garments from home, private purchase, supplied by relief organizations, etc. This style jacket is good that in its plainest form, it is just a jacket and it does not lock you in to a particular theater or period of the war.