This is a remix of the Hammer done by ChaosCoreTech https://www.thingiverse.com/thing:1311108 original link.

I put all of the files together to make a single piece hammer that can be printed all at once, this is also scaleable and looks great at 50% as a desk piece.

Only bigger 3d printers will be able to print full size,

The inside is still hollow, and will need supports turned on in your slicer, but it will print faster than the solid version.