I'm using these magnets to attach a wall mailbox to a steel door. They are perfect. Very strong but the rubber prevents scratches to the paint. The rubber barrier does diminish the pull force of the magnets (they're still very strong, but much less than uncoated magnets I have of a similar size), but that's not a problem for me. I imagine most people who want rubber coated magnets are prioritizing the scratch prevention to pull force. These are still very strong, and are large magnets sized such that the reduction in force is compensated by their larger size. The hardware makes them attach very securely.
Power Up Your Projects With MIKEDE Cube Neodymium Magnets - Super Strong Rare Earth Magnets For Science And DIY
31 Review
Powerful Neodymium Bar Magnets With Double-Sided Adhesive - Ideal For Home, Office & Scientific Uses - Pack Of 16 Magnets
40 Review
MIKEDE Strong Neodymium Disc Magnets, 16 Pack Powerful Permanent Rare Earth Magnets With Double-Sided Adhesive, Fridge, DIY, Building, Scientific, Craft, And Office Magnets, 1.26 Inch D X 1/8 Inch H
40 Review
MIKEDE 8-Pack Powerful Neodymium Magnets With Double-Sided Adhesive - Ideal For Fridge, Crafts, DIY, Science, Building & Office Projects - Rare Earth Magnets For Strong Grip
39 Review