The video showing many of our HD key lock caps is here.
Many vehicle owner's use black electrical tape to cover door locks... but no more of that thanks to quality, tight fitting door lock caps.
For those that live in locales where freezing rain, snow/ice occurs, door lock caps can help prevent frozen door locks. Some people use black electrical tape over the door locks in the Winter.... for sure a custom door lock cap is a far better way..
Also, those that live beachside... have a beachside residence use door lock caps to keep sand and salt mist out of the door locks.
For those that off road, drive their vehicle on Farm pastures, mud and more, lock caps keep cow chitt, mud and stuff out of the locks.
Yup, door lock caps are more then "cosmetic" and are functional..