This is a holder and waste basket for the Filament Cutter https://www.prusaprinters.org/prints/67509-filament-cutter-45deg designed by Pomi.
I loved the idea of a filament cutter bracket on the printer that would keep it from getting lost.
I used the design from Kaskade911 as a mounting system but wanted an easier way to remove the scraps rather than having to unscrew the unit. I blended SirSpacePickle's mount which had a scrap collection drawer but was to be mounted on a 2020 frame.
This mounts to the MK3S, MKS3+ as described by Kaskade911.
You can download the bracket mount knob from:
https://www.printables.com/model/99070-filament-cutter-bracket-for-prusa-mk3
The author remixed this model.