Made of thickened SUS304 stainless steel, it resists scratches, corrosion and oxidation. The storage surface is very stable, and the corners are slightly rounded, which is very practical as a small storage. This one can carry more than a cell phone. Installation method: double sided tape, no drilling required. The toilet paper holder is well made and really looks your life better, if you want to replace your existing toilet paper holder, this is the best choice for you