This holder is designed to fit the Elegoo scraper and affix to any ferromagnetic frame such as that for the Elegoo centauri carbon (pictured). It uses three 10mm x 3mm magnets. It has the benefit of being able to fit multiple scraper blade sizes including an extended plastic blade.

V2: changed so that the scraper can be inserted in either direction. Also, I slimmed it down to use slightly less filament. Finally, I made the magnet holes slightly smaller so that the magnets fit in snugly. I find that pushing the magnet into the holder using a flat surface like a table works best.