Durable: The closure of the part of the fasteners is made of durable, non-crumbly plastic and unmarked adhesives because they are robust, immovable, resistant and last a long time. Easy to use: Easy to use, easy to drill. Glue the sheet to the attached area, open the plastic capsule, press the muff firmly and attach the bandage to the window without leaving marks. The grille can be installed more quickly in the window frame. Fringe-free: The back of the frame is provided with unmarked adhesive tape, don't worry about footprints. When you no longer need it, you can take it directly out of the window, inconspicuously and quickly. Hold on: On the back of the window closure there is a pouch holder without a contract, which is Velcro and practical. The windows are safe and unglued. Multi-purpose: A device with bars is installed in the kitchen, office, living room, bathroom, balcony, hallway, workshop, facility, etc. Just have a fly screen installed.