The listing, Magnetic Screen Door/Anti-Bug Screen - NIP has ended.
The box says that no tools are required to put this up. I took it out of the package to look at it. Magnets look pretty sturdy that hold the two panels together. There are no instructions inside or on the box. There are a number (maybe 6) sticky-sided velcro pieces that I assume line up with some other velcro on the actual screens. There was also a bag of little flat push pins that I assume would be used to secure the top to the inside of a door frame. Without instructions, one would have to really figure it out (and you actually might need to use something to help push those things in unless you have either tough fingers or soft wood frames in your house). The cat hated it as soon as I brought it out of the box. Dad thought it was useless and would get in the way while he was going in and out of the back door to get tools to fix the roof. So passing it on.