Make this hyper-useful brass hammer with only simple tools - for under $100

Brass hammers are A) more dense than steel, B) don't damage steel parts you're working on, C) don't spark (in combustible environments) and D) have excellent impact kinematics.They're a superpower in the home workshop, basically.Proving a point here: I made one in under a day, for under $100, without using special tools, and you can, too. So just get started.