$7 Worn Thor Mjolnir Hammer 3D model by shehrozemughal. Available on CGTrader with 15000 polys and 10000 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 2.09 MB), OBJ (OBJ, filesize: 3.02 MB), FBX (Autodesk FBX, filesize: 1.27 MB), GLTF (glTF, filesize: 190 MB), BLEND (Blender, filesize: 79.6 MB)