I hate to break it to you but, that is not a hammer axe. That is in fact a smoking axe. used for decoration and ceremony. the blade has a hole in it for looks. the handle is studded with nails or tacks for decoration. And the bottom of the handle? Yup that's shaped as a mouth peace. the handle itself has a hole going through the center and the bit on the opposite side of the blade is a bowl for tobacco/ other smoking herbs.
Functionally the axe can kill someone or skin a scalp, but I would not use that as a tool unless I had nothing else.
(source) I do living history re enactments and have seen those axes my whole life and own a couple. just thought you should know. they are cool though lol