Stay safe: Prevent windows and patio doors from accidentally opening due to gusts of wind with our casement window vent. Safety lock system for inward-opening turn and tilt windows, which installs directly onto the existing handle without additional screws. Adjust the opening: Our window restrictor allows you to adjust the opening angle to lock the window in different positions and prevent accidental closing. Suitable for casement and sash windows, wood or metal, and is easy to install. Protect your children and pets: Thanks to its safety locking system, this window opener is ideal as a safety device for children and cats. It offers a secure alternative to other more complex and difficult to install window locks. Say goodbye to drafts: Our window restrictor prevents drafts and gusts of wind from slamming your windows. It allows you to enjoy fresh air without sacrificing your comfort or safety. Versatile use: This window opener is suitable for all normal casement or sash windows, made of wood or metal. It can also be used to adjust the opening of windows and to prevent their accidental closing.