Here is a straightpein hammer that I forged from a pre-existing ballpein hammer.
I had bought a set of 4 cheap ballpein hammers off of amazon a while back with the intent to just use them as a cheap source of material to forge various tool heads from with out having to put a whole lot of work into the project.

The hammers being sold were honestly very terrible quality, the handles weren't even fitted on right so I've seen some funny reviews of the hammer heads flying off.

This straightpein hammer is a bit light weight compared to an old blacksmith made one, but that's good because I will be able to use it for quicker strikes as well as lighter hammer blows that won't distort the metal too much.
A precision tool.