Years ago, I put a leather handle on my Bowie Knife. I cut slots out of thick leather "discs", and then fitted them down on the tang. I had a piece of cold roll steel end cap, threaded to fit down the beck end of the tang. I put elmer's glue between the layers of leather, and then cranked that end cap, or pommel, down using a big plumber's wrench. When it bottomed on the tang, I took it off, put another leather washer on, with some glue, and tightened that down with the wrench again, until it bottomed. Glue oozed out of every layer of leather. I wiped off the glue I could, and left the knife to dry. That was about 45 years ago. The handle is still there, and works just fine.
I bought a leather mallet or hammer at my local Ace hardware store. Its made of raw hide, glued in a roll, with the wood handle fitted to a hole drilled in the dried leather wrap. Its worked fine for years. Its for hitting wood, and soft metals, so you don't mar the material being struck. I don't use it to pound nails. :idunno: :surrender: :grin: :hatsoff: