#insetting

I did a tutorial by 

The Subdivision Surface Modifier, possibly the most commonly brought-up modifier in Blender tutorials, made it easy to turn an already beveled sphere into something like this tutor4u about modeling a medieval battle hammer kinda object.

Using the Sphere Transmormation, I could turn the flat, square end of the hammer into something resembling a circle. (Click ‘mesh’ + ‘transform’ + ‘spere’)

The X-ray vision view mode made it possible to both see and select vertices and edge on the opossosite side of the mesh, something I’d previously wasted time switching all the way to wireframe mode in order to achieve. (Alt + Z)

Insetting close to the tips where rivets tend to show up helped smooth out the geometry, and make the object seem more realistic.  I did 2 insets close to the edge to create a desirable effect. (’I’)