Scotch Indoor Double-sided Mounting Squares are ideal for painted surfaces and allows you to quickly and easily beautify and organize your space. Whether you’re creating a gallery wall or affixing the family chore chat, these permanent double-sided foam squares deliver a strong bond every time because of their 3M industrial strength adhesive. Your work is up and ready to admire in 30 seconds flat – no nails or hammer needed. Permanent. Ideal for painted surfaces. Intended for indoor use – delivers a strong, permanent bond on contact. Designed for painted drywall, finished wood, metal, acrylic, tile and glass. Holds up to 6.8kg, featuring 3M industrial strength adhesive. Use 3 squares to hold 0.45kg. Use 45 squares to hold 6.8kg. 25×25mm size.