Black Kung Fu Kid Strength 3M Adhesive Stick Hook Free Nail 7pc Hook for Kitchen Door Bathroom Size: 2.3*2.3 inches. Made of high quality manganese steel, adding fluorescence agents after high temperature roasted to increase gloss of hook. Strong 3M adhesive, fast and strong load-bearing capacity, load 20 pounds. Waterproof design, suitable for wet bathroom and kitchen space. The edges using smooth and grinding to avoid injury,safe and beautiful.