Usage Tips:Description: Durable Material This window limiter is made of a durable and sturdy alloy, high hardness, wear resistant, sturdy and durable to use. Comes with screws for easy installation.Adjustable and ReliableThe window restrictor is adjustable, you can adjust the ventilation window at will, easy to use. Child Safe ProtectionWindow safety lock used for fixing the position of window, helps prevent children from accidentally opening windows or doors, providing an extra layer of security for your home.No WorryThis window limiter meet the needs of window ventilation and fixation. There's no worry of the sudden shut of the window by strong wind which will not damage the window scare babies.Wide Applications: The security window lock is suitable for home, bedroom, living room, kitchen, toilet, window, door, fridge, cabinet, drawer, etc. Specification: Material: Alloy Size Chart: 17cmx3cm/6.69inchx1.18inch Package Includes: 1 Window Lock Note: Please allow slightly errors due to manual measurement and different monitors.