HIGH QUALITY AND SAFE MATERIAL: The child-safe window locks are made of soft steel, which is safer and more flexible. The rotating bolt can withstand higher pressure and is not easily damaged or rusted. Child-safe window locks: When window restrictors are installed, the window's opening distance is limited, which is ideal for homes with children. Children cannot reach dangerous areas, preventing injuries. EASY TO INSTALL: Our window lock is an excellent addition to your home safety checklist and is easy to install with the included mounting template and screws. Baby safety locks can make families safer and parents freer. Wide range of applications: Baby safety locks are suitable for most types of windows or doors, such as PVC, wood, aluminum, and metal materials, etc. Window locks are the ideal product to ensure your children's safety. ADJUSTABLE OPENING WIDTH: Our inward opening window locks can be adjusted to 4 different opening widths, allowing you to adapt them to the width you need. Very practical for daily use. White shipping quantity: 2 pieces Note: Data is measured manually. Please allow an error margin of 1-3 cm. Due to the difference in light and display, a slight color difference may occur. Please refer to the actual item.