Awesome magnets, but adhesive stops working quickly

I really like these, but the included adhesive pad (3M brand ) came off after only a week. Not an overly heavy object (2 lb handgun) either. Love the thinness of these, love the flexibility, and the magnetic strength is awesome! but I had to screw them down. Now I have screws coming through a shelf and are noticeable...adhesive option was the reason I bought them, so disappointed, but still made it work and I love the magnet

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