$10 Arm Extension Machine 3D model by ReyesRicardoM. Available on CGTrader with 52990 polys and 35406 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 2.53 MB), FBX (Autodesk FBX, filesize: 1.57 MB), MAX (Autodesk 3ds Max, filesize: 1.91 MB)