Material: This child safety locker is made of plastic and stainless steel, which is rust-proof, wear-resistant, and durable. Each lock comes with two keys, providing convenience in case one is misplaced. Size: The length of this door stopper is 25.7 cm (10.1 in), suitable for most doors and windows. The length is fixed; maximum window opening distance is achieved when installed horizontally, while minimum opening distance occurs when installed staggered. Good Protection: This refrigerator lock helps prevent children from opening refrigerator or cabinet doors without supervision, reducing the risk of spills or injuries. It provides added safety for households with young children. Easy to Install: This fridge door stopper features a self-adhesive design for easy installation. With strong adhesion, simply remove the protective film after positioning and press firmly onto the surface. No drilling required, preventing damage to furniture. Wide Application: This child window protector can be used on refrigerators, cabinets, doors, windows, drawers, and other smooth, dry, and clean surfaces such as tile, glass, and metal.