0 the part of the head (= top part) of a hammer that is opposite the flat end and can be of various shapes: --
You can practise on scrap pieces of metal before trying to peen your scythe blade.
It's like attacking a battleship with a ball peen hammer.
The hammerhead consists of a slightly bevelled flat head as well and a rounded cross peen.
The other hammer has a peen tip with a cylindrical die.