No drilling and NO damage to wall and NO need additional tools. Just peel off the adhesive cover and install. Powerful transparent adhesive hooks stick to surface for a long time, more durable and stronger than suction cup. ONLY for 90Â°corner, for better use experience, please use the shower corner caddy 24 hours later after installation. This bathroom Corner shelf is made of a high quality SUS304 stainless steel, that durability makes the Corner shelf is easy to sanitize, Strong adhesive ensure the bath shelf stable and can hold several items, therefore ideal for kitchen and bathroom.