This specific 3D model, "Hammer 3D model 43", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
The license for this digital asset is "Unknown license".
STL (Stereolithography, filesize: 658 KB), OBJ (OBJ, filesize: 596 KB), DAE (Collada, filesize: 1.13 MB), FBX (Autodesk FBX, filesize: 818 KB)