Features PERFECT FIT: To ensure the lock fits perfectly with your window, please measure the sliding door or window track before ordering, required height must be greater than 0.39 inch and width must be smaller than 0.39 inch. MULTIPLE APPLICATIONS: The lock is suitable for sliding patio door, sliding window, sliding glass door, vertical door, retractable screen, and more, and can be installed on most window or doors. EASY INSTALLATION: The window lock stopper features quick and convenient installation without extra tools or drills. Simply place the lock in the appropriate position and tighten the screw. STAINLESS STEEL MATERIAL: Made of sturdy and reliable stainless steel, the window security lock is rust prevention and anti aging, ensuring long lasting service for your safety. ADJUSTABLE DESIGN: The sliding window stopper allows you to adjust the window to a suitable position, preventing it from being pulled or opened, ensuring your security. Specification: Item Type: Window Lock Material: Stainless Steel Package List: 3 x Window Lock 3 x Triangular Key Package List 3 x Window Lock 3 x Triangular Key