The window restrictor, with its modern aesthetic, is designed for safe ventilation and the prevention of accidents by limiting how far a window or door can open. Wide use in residential and commercial settings such as family homes, offices, hospitals, hotels, school, daycares, etc. Features - Color: As shown. - Size: 3 x 2.4 x 2.4cm. - Material: Aluminum alloy. - These courtyards, doors, sliding glass doors, sliding slider locks are perfect for windows and more. - Durable aluminum construction with internal vinyl lining to prevent scratch damage. - Can the extra grip window to close or ventilate position. - Use double thumbscrews to mount on windows or sliding door rails. - Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 3 x Window Lock