KINK3D cages do not generally set off metal detectors. The PA12 nylon used for our 3D-printed products is invisible. The amount of metal in a standard lock is small, and if desired you can use the Airlock to go completely metal-free.
KINK3D cages do generally set off mm-wave (rotating) security scanners, which are found in many airports.
Results may vary. Consequences are ultimately the responsibility of the wearer. Please take care and use good judgment deciding where it is appropriate to wear your device.