So, I'm a big fan of Alec Steele and love watching his smithing videos. This rounding hammer is inspired by the one he uses.
The set comes with 2 models. One is high-res and the other (right of the two) is a lower poly version. The high poly has about 7mil face and the low poly has about 1mil. This came out great on the resin printer with support on the underside of the faces and handle.
I printed this on a Halot One resin printer. It printed out well with support under each hammer face, around the neck and under the base of the handle. I provided my sliced file for a 10cm print. It's for creality box and will show you where to put support, or print.