" Security: To prevent break-ins, the device locks the window and renews the air inside when it is ajar. Appearance: Professional surface treatment, sturdy, compact and beautiful. Made with high quality materials, easy to open and suitable for most plastic, steel and alloy windows. Multi-Purpose: These locks work on most wood, glass, plastic and metal surfaces. You can protect your sliding doors, porches, cabinets, showers, storage rooms and entertainment centers as well as sash windows. Your child will be able to explore without getting hurt. HIGH QUALITY: Our sliding door locks are made of durable metal and reinforced with rubber. Our sliding door locks limit and lock the opening of sliding doors and windows, ensuring the safety of your children. Internal security. Product Description: Description: This product is designed to increase the security of horizontal sliding windows. Adjust your window locking system to open securely and prevent theft. Used to keep windows closed or partially closed Open. The steering wheel is adjustable in length for easy operation. Features: - Material: Metal + Rubber. Black color. Dimensions: approximately 6 x 4 x 2.4 cm. Package content: 2 door and window locks. Description: Lock the window before installing this product. Insert the rod of this product into the groove so that it is firmly fixed inside the window sash. Turn the handwheel clockwise until the product locks. Raise the window frame at least 4 cm. Disclaimer: 1. Due to manual measurements, there may be a difference of 1-2 cm in the dimensions shown. Please only order if you accept this margin of error. 2. Please also note that due to the different positions of the image, there may be chromatic aberration in the colors. "Note: The data are all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending the physical item received Delivery quantity: (according to the main picture)