This is a 3D Printable chain made to look like it came off a bike. It comes off the bed assembled. This should not be difficult, but your printer does need to be well tuned.
I recommend .2 mm settings, And personally use a .7 mm nozzle. It is important that you review the model in your slicer and make sure the links are only separated by one layer. Do not use support material, it is not needed. High cooling is important also.
Once printed, You need to "Break each link" away from the other. Carefully twist it so that it begins moving. Keep working it to loosen the bracelet. If you break a link, you can use a soldering iron plunged through the side to fix it. The design however is functional even if it is broken internally.
A Step file has been provided if you wish to modify the length a bit, or scrunch up the chain to fit a really small bed.
Please let me know if you need anything added, or if it does not work for you.
Good luck and happy Printing!
Do not use this on a real bike of any kind or you will likely be drinking out of a feeding tube for the rest of your life.
This model was made in Fusion 360