Features: 1. Super easy to install. No drilling, no mess and no handyman required. 2. Made from premium material, non-toxic and available for long service life. 3. Suitable for aluminum alloy sliding windows. 4. Our sliding window locks limit of sliding windows so your little one stays safely inside. 5. The contact surface is made from quality material will not harm to your window. Specification: Condition: 100% Brand new Lock Body Material: 6061 Aluminum Screw Material: 304 Stainless Steel Weight: Approx. 67.6g/ 2.4oz Package List: 3 * Lock Body 3 * Lock Core 3 * Wrench Note: The measurement error is about 2 mm, thank you for your understanding. Package List 1Super easy to install. No drilling, no mess and no handyman required. 2Made from premium material, non-toxic and available for long service life. 3Suitable for aluminum alloy sliding windows. 4Our sliding door locks limit and stop the opening of sliding doors and windows so your little one stays safely inside. 5The contact surface is made from quality material will not harm to your window.