Chain of links 3D model is available on CGTrader for $8. Original author: tomb3d. Specs: 6048 polys, 3024 verts.
OBJ (OBJ, filesize: 58.9 KB), 3DS (3D Studio, filesize: 23.1 KB), MAX (Autodesk 3ds Max, filesize: 35.5 KB), FBX (Autodesk FBX, filesize: 27.5 KB), DXF (DXF, filesize: 111 KB)