A not-too-distant-future padlock with fingerprint sensor, solar panel, and free-moving latch (prefabs have been included of open/closed variations, though it's free-moving so it can be configured to any position). The padlock is fashioned to appear to have had some mild use (dents, bumps, fingerprints, scratches, and a few knocks here and there). The fingerprint sensor uses the emissive channel of the material so it's always visible in dark areas.
As always, for a better impression of the asset inside the Unity engine, please view the YouTube video in the screenshots section.
(metallic PBR workflow used / all models are .FBX format)