Anpro 120 Pcs Ceramic Industrial Magnets Hobby Craft Magnets-11/16 Inch (18mm) Round Magnet Disc for Refrigerator Button DIY Cup Magnet Craft Hobbies, Science Projects & School Crafts
These 18mm ceramic magnets are what I use when I want a printed part to locate and hold in place without adding screws or complicated hardware. The big takeaway is designing the pocket to the magnet you actually have—measure it, model it, and you’ll get a much more reliable fit.
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