The adhesive is very strong! Use a level when installing. I wish the backing were less permanent, or that the mounting tape came separately, so there would be an easy option to use command strips for mounting.

The metal strips are sturdy and a great size. Needed magnets on outside of cased fridge.

Purchased these for my work cubicle. Works great. These are in the hallway at school which experiences wide temperature fluctuations and varying humidity.

Low quality junk. Each metal strip has a hole on either end for screws, no mounting hardware can with this set just sticky material covering almost the entire width and length. It seems like really cheap material that has a magnetic mark on it.