I use these in several 3D printed designs to adhere parts to metal surfaces. These have functioned perfectly for those purposes. If you want something that has greater 'Adhesion', try the 5mm thick version. I use both the 3mm and the 5mm thick ones in my designs and I have placed multiple orders. All have arrived quickly and worked perfectly. Like all Neodymium magnets, they are a little brittle so don't allow them the snap together as they tend to shatter when that happens.
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
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
Powerful Neodymium Bar Magnets With Double-Sided Adhesive - Ideal For Home, Office & Scientific Uses - Pack Of 16 Magnets
40 Review
16-Pack Powerful Neodymium Bar Magnets | MIKEDE Rare Earth 🧲 Metal Magnets with Double-Sided Adhesive | 60 x 10 x 3 mm
35 Review