Security LockThis sliding window lock can freely control the width of the window, prevent children from leaving the window, and ensure the safety of the family to some extent. SizeSimple lock: 3 x 2.4 x 2.4cm / 1.18 x 0.94 x 0.94 inch. Suitable for rails with height more than 12mm and thickness less than 16mm (Note: If the window rail is located in the center of the window, this product cannot be used). Material SturdyMade of durable aluminum alloy with a yellow plastic cover outside the wrench handle to prevent scratches or damage to the window, and can be used for a long time. Installation EasyIt can be installed without punching and is not easy to rust. Wide ApplicationThe window lock is suitable for horizontal sliding windows, vertical sliding windows and sliding doors, such as patio doors, sliding glass doors, sliding windows, etc. Not suitable for plastic window frames. Number of pieces supplied: 8