This mallet can be used to fulfill our dream of using our hands as a mallet, I use it to assemble cabinets and tables, and it's so useful that it's not just for decoration.
 

Printing notes:
Filament: PLA+ or ABS
Strength: 4 wall loop and 15% sparse infill density
Support: Need for mallet head only
Color: esun metal silver, bambulab brown
 

Assembly notes:
The small holes in the handle are for inserting 8mm diameter aluminum tubing for extra strength, if you don't have aluminum tubing it will work.
The handle and mallet head are glued with quick-drying adhesive. If the assembly is too loose, you can use paper tape to wrap around the handle 1-2 times to fill the gaps.

Notice for use:
Do not use it to hammer nails, it may cause damage to the mallet head.