4 Sliding Door Locks For Kids, 4 Sliding Door Locks With 8 Universal Keys, Each Sliding Door Lock Comes With 2 Keys (Keys Are Universal). Easy Installation Supplied With All Security Fixing Accessories, Includes Screw Covers stainless steel. (Attention: Drilling is required; the white cap is used to decorate the hole made by the electric drill.) Zinc Alloy Made of zinc-copper alloy, prevents rust, durable and quality. Child safety lock prevents accidents due to to open windows and unlocked doors, useful to protect your children. It is suggested that the locks be adjusted at the top and bottom for maximum security. Suitable application for most hinged or sliding doors and windows. Perfect for home, public, hospitals, hotels, schools and other childrens places.