You will get2 Pcs window restrictor, which does not need to be perforated, is equipped with a strong adhesive backing, just stick it to the window and wait a while for it to work, it effectively limits the opening distance of the window and protects babies and children from harm. High quality materialsour window restrictor is made of high quality ABS + stainless steel + total, it is strong and durable, resistant to corrosion and rust, impact resistant and not easily deformed, it can be used on the window for a long time. Easy to installuse the 3M adhesive tape provided, locate the window and apply the sticker to the window, then attach this window restrictor to the wall and wait 24 hours for it to be ready for use. You can adjust the spacing of the installation according to where you need to open the window snowball, the greater the spacing the smaller the distance the window will open, the smaller the spacing the smaller the range the window will open. VersatileThese window position restrictive, a great gift to protect babies' healthy development, are ideal for restricting all types of windows, fridges, drawers and guys and are ideal for keeping children safe.