Features 1,Child Window Lock for Added Security: Designed to keep partially opened windows secure, these locks prevent curious children or pets from inadvertently falling out. 2,Adjustable Locks: Prevent unauthorized entries through the windows, suited for addressing covert entry attempts, help shield your family from intrusions and provide peace while embracing the breeze. 3,Applicable Track Size: Suitable for window tracks of size 3 or 16 inches only (The width of your window track should not exceed 0.18 inches and the height must be more than 0.44 inches) 4,Easy to Install Within Seconds: With a knob style key, these locks can be easily tightened, clamp on the track of a sliding window or door, easy to lock and clamp in emergencies. 5,Versatile and Portable: Suitable for sliding glass windows, retractable screen windows, and patio windows of homes, offices, apartments, or rental properties. Specification Item Type: Sliding Door Window Locks Material: Aluminium Alloy Package List 10 x Sliding Door Window Lock Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.