This is a set of 4 popular T-shaped hooks that are installed with screws. The color is matte black. I bought them online, but I made a mistake, so they are new and have never been used. I opened one small bag of screws to check the photos and installation method. Since there were no instructions on how to install them, I've included some images of a similar installation method as the 6th photo. I think the steps are probably: ① Make a hole in the wall ② Insert the small white plastic tube into the hole in ① using a hammer ③ Remove the screws in the ④ photo using a hex wrench ④ Align the back cover of ④ with the hole in ② and secure it with screws ⑤ Attach the T-shaped hook This is just a guess, so please install them at your own risk. Although they are screw-type, you can use them without making holes in the wall by attaching double-sided tape or a magnet sheet to the back. I hope you will consider this. Please feel free to comment if you have any questions.