No drilling required - Glue is included and will never damage your walls. Strong Glue - Glue can hold 100 kg / 220 lbs. Large capacity - can store soap, shampoo, face wash, lotion, brushes, etc. The towel rack can be used to hang towels. Made of durable aluminum that will never rust. Easy to install - can be installed on any smooth uneven surface, ceramic tile, marble, glass, frosted glass, metal, solid wood walls, etc. Do not stick the shelf on painted walls or wallpaper. Please wait 72 hours before using. Delivery quantity: one piece. (Glue and screws are included in the package)