2 Pack Sliding Window Stopper Lock with 2 Keys - for Thickness 1/4" Small Frame Edge Clamp, Aluminum Alloy Windows Frame Locking Tool for Home Children Safety Sash Requires Drilling

["THE MAXIMUM CLAMPING DISTANCE: 0.1-0.2\"/3-6mm, DRILLING DIAMETER: 0.28\"/7mm. Read the dimension drawing carefully before purchasing and confirm that it is suitable for your window type. Note: This window lock needs to drill a small hole with a diameter of about 7mm in the installation position.","The original screws are suitable for mounting on rails with a thickness of less than 4mm; the included long screws are suitable for rails from 4mm to 6mm thick.","Applicable occasions: home, hotel, large windows, hospitals, banks and so on.","Note: Default is with universal key. If you need separate key, please let me know.","Requires Drilling, Requires Drilling, Requires Drilling...Important things say three times."]