This specific 3D model, "Door handle 3D model 11", is an asset made available by "Unknown author".
You can download this asset for free at "Unknown platform" by following the link.
This specific 3D model is provided under the "Unknown license" framework.
OBJ (OBJ, filesize: 15.9 MB), FBX (Autodesk FBX, filesize: 14.7 MB), BLEND (Blender, filesize: 18.2 MB), PNG (PNG, filesize: 13.9 MB)