[PREMIUM MATERIAL]: Window latches made of sturdy and durable aluminum alloy. Yellow plastic cover outside the handle, can serve you for a long time [APPLICATION]: Apply to windows and doors, make sure the track height is above 1.5 cm / 0.6 inch, the track thickness no more than 1.6 cm / 0.63 inch [EASY TO INSTALL]: Each lock is equipped with a hex key, make Slowly rotate it in the hole by just holding it on the track by key control, without additional installation tools. [MUST-HAVE ITEMS]: Open the screen window when it's hot in the summer, use the window locks to fix the screen window and prevent thieves [WELL NOTE]: Window lock does not apply to the middle track of the window, please check your window track before buying Features: Material: Aluminum Alloy The handle is made of plastic material Color: silver Size: 52*64*20cm Package included: 8 x Aluminum Alloy Window Locks NOTE: NOT applicable to middle track of the window, please check your window track before purchasing