You need to have the pro version of kustom klwp installed on your phone to use the wallpapers/komponents. You need to have the pro version of kustom kwgt installed on your phone to use the widgets. You need to have the pro version of kustom klck installed on your phone to use the lockscreen presets.
BaconBits is the developer of the app that can be found in the Personalization category. BB Freebies for KLWP/KWGT/KLCK was downloaded and installed by over 10K users and its latest stable release was on Sep 13, 2020. This application has been rated 4.6 on Google Play.
It's free of charge to download the installer of BB Freebies for KLWP/KWGT/KLCK, also, you can read users' reviews on Droid Informer. The app works fine on Android 5.0 and above. The app is completely safe for downloading.