The lock is made of zinc alloy, and it is safe and non-toxic. You can use the lock at your home, and it can prevent your baby being nipped by the window, which can keep your baby safe. Features: High quality: made of zinc alloy, safe and non-toxic, odorless and healthy. When you use the lock at your home, it can prevent your baby being nipped by the window. Reusable and durable: can be used repeatedly and durable for long time use. Easy installation and easy to use, just fix the lock by the screw. A very useful safety lock, keep your baby safe at home. Specifications: Condition: 100% Brand New Material: Zinc Alloy Color: White Large Lock Size: approx. 16*24*13mm/ 0.62* 0.94* 0.51in Small Lock Size: approx. 15*17*56cm/ 0.59* 0.66* 2.20in Distance of Two Hole: approx. 39mm/ 1.53in Weight: approx. 75g/ 2.64oz Package list: 1* Lock 1* Key 4* Screws Note: 1. Please allow 0-2cm error due to the manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. please take the real one as standard. 1High quality: made of zinc alloy, safe and non-toxic, odorless and healthy 2When you use the lock at your home, it can prevent your baby being nipped by the window 3Reusable and durable: can be used repeatedly and durable for long time use 4Easy installation and easy to use, just fix the lock by the screw 5A very useful safety lock, keep your baby safe at home 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. Sold by-YJL official store