This is a simple jewellery chain with a trace style chain and a spring ring lock.Each component are separate objects.
For Blender (native format) there is a simple Modifier rig for easy editing and fitting for your liking (Array and Path modifiers). The chains direction and lenght follows the path.
Parts are UV-unwrapped and are packed within the same UV-area.Vertice and Polygon count are stated with all the parts added together without the chain array and no Subdivision Surface on.
BLEND (Blender, filesize: 1.04 MB), OBJ (OBJ, filesize: 384 KB), FBX (Autodesk FBX, filesize: 164 KB), GLTF (glTF, filesize: 504 KB), STL (Stereolithography, filesize: 274 KB), DAE (Collada, filesize: 728 KB), ABC (Alembic, filesize: 33.9 KB)