Making a cool leather wallet is easy. Just get yourself some scrap strips of leather ant you are good to go. No special tool required.
You can see full process of making this simple wallet in the video.
Step 1: Cut you leather.
Cut your leather with some extra space on the sides.
Step 2: Make slots
You can use thinner leather on the inside. it will be better for cards.
Step 3: Put it together
Put it together with super glue.
Pinch holes after and sew the ends.
Step 4: It's ready
Cut it to the finlal size. Its ready to go!