It is a simple design of the Thor's Mjolnir, with the circular rings handle, and the main body. The main metal part of the hammer is kept plain, without the Norse engravings. Additionally, in order to consume less material (filament), I have kept the inside of the hammer filled with nothing but space, and just the outside consists of material.

When the parts will be printed, the handle, middle part of the hammer, and the two side sections of the hammer will be printed separately, and they will need to be stuck together by glue.