Ndfeb has such a use

People often carry keys in their daily lives, and many people have headaches because they have nowhere to put them. In a pocket, it is easy to get across the skin, and it deforms the clothes. It is more likely to be lost in motion. Here I suggest a way to solve this problem by using two small magnets to make a key chain. And of course, these two magnets, you're going to use a strong magnet for nd-b.

In the following picture, the ndfeb magnet is placed in the silicon in the keychain, and two small magnets can be tightly sucked together. Normally, we can lock the key in the pants, carry the key, convenient and beautiful.

When we get home, we can hold the magnet key to the refrigerator, save the space and find it easily, so we won't be able to find the key.