4 Pcs Plastic Stainless Steel+Zinc Alloy UPVC Child Safe Security Door

Double-sided: Strong double-sided tapes are included with the product. The tapes on the inner two surfaces of the product are removed and glued to the desired surface.
Installation: The area where the product is to be applied must be clean. First, clean and dry dusty, sticky, etc. surfaces with a slightly damp cloth.