3 different cuban chain designs
Base models plus full scene as shown on pictures.

OB, FBX, 3DS exports of single chain pieces
OB, FBX, 3DS exports of female and male neck stand

For C4D users basic clone along spline setup includes
As well as the render scene.

Design 1 has a open and close mechanic model on the back
Designs 2 and 3 don’t have a open and close mechanic model on the back