BOTH INSTALLATION METHODS ARE APPLICABLE - The installation method is divided into self-adhesive and wall mount drilled. The 3M Self-adhesive and screws accessories are prepared inside the package.It's very easy even you don't have any DIY experience LARGE CONCAVE SHELF ON TOP - The toilet paper holder with shelf is larger than other, enough for holding various items, such as iPhone Max, wet wipes or container, air freshener etc. Special concave design for you to pick up things easier and prevents things on the shelf from slipping HIGH QUALITY OF MATERIAL Toilet paper holder with chrome shelf is made of Premium Grade SUS304 stainless steel material with a nice smooth surface. Strong and water-proof adhesive backing. It resists daily rust and corrosion. You can wash or clean it without any concern MODERN & STYLISH DESIGN - There are two color options for matt black and brushed nickel. Waterproof, rust-proof and corrosion-resistant, fits almost decor style, Adds great beauty and reduces annoying cleaning for your bathroom, bedroom. HUMANIZED DESIGN - All of the edges are deburred properly to prevent hand-cut. Upward end of the holding bar keeps paper in place, prevents toilet paper roll from falling off.