$7 Pendulum Blade 3D model by edplus. Available on CGTrader with 6008 polys and 3008 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 25.4 MB), OBJ (OBJ, filesize: 25.4 MB), FBX (Autodesk FBX, filesize: 25.4 MB), DAE (Collada, filesize: 25.5 MB)