【High quality】 The window handles are made of high-quality aluminum alloy, rustproof and corrosion-resistant, suitable for replacing old window handles or for building new ones. Suitable for left and right handles.【Installation size】�This window handle is manufactured to standard industry dimensions. It uses a 7x7mm square spindle with a 43mm locking pin length and 43mm screw spacing. The locks are easy to install, and each handle comes with one key, two screws, and one cap. One key can be used for all cylinders with the same locking mechanism.【Security】The window handle can be used as a child safety/anti-theft device. By locking the window inside the house, it offers more protection for the child and provides greater security for the parents. It is suitable for inward and outward opening plastic windows, aluminum and wood windows, as well as tilt-and-turn windows.【Easy to use】You don't need to remove your old window handle to replace it with a locking handle. Simply unscrew the old window handle using a screwdriver, remove it, and replace it with a locking handle. After attaching it to the window with two screws, it's ready.【Application】It is suitable for almost all inward and outward opening windows/balcony doors and installs quickly and easily in just a few steps. The inline locking window handle can be used on the inward and outward opening of plastic, aluminum, and wood windows, as well as angled windows or doors.