[TWO INSTALLATION METHODS] The shower corner shelf with complete installation accessories, you can choose drilling or adhesive mounting. Note: The adhesive installation is suitable for smooth hard surfaces such as ceramic tiles, smooth marbles, glass, metal, and solid wood. The corner of the shower shelf is only suited for the 90-degree corner, not suited for a rounded corner.[RUST AND SCRATCH PROOF] Crafted entirely of exceptional quality aerospace aluminum for durability and resistance to rust, corrosion, and tarnish. Our corner shower organizer is also equipped with sandblasting technology for a strengthened surface to withstand any scratches, it’s not matte, more like shiny under the light.