4 PCS Childproof Window Locks: You will a package Including 4 pcs window cable locks, 4 pcs keys and 16 pcs screws. White look of window lock adds elegant style for your window. Ideal solution for home sefety improvementPremium Material: Made of premium zinc alloy and upvc material, lockable window restrictor locks are sturdy and rust-proof. Can withstand a lot of pressure, not easy to wear out. Ensure long-lasting performance and offer reliable child home safetyEasy to Install: Our window safety locks can be locked and unlocked. Flexible use. When the cable is in place, there is the distance of 19cm that window can be opened. Once the cable is removed from one end with a key, the window can be fully openedAdd Extra Security: window restrictors are specifically designed for children 's safety. Effectively limit the distance a window can open to prevent children from falling out of windows. Can also discourage intrusions and keep air circulationWide Applications: Suitable for most types of windows and small doors. Widely used for many kinds of materials like UPVC, wood, aluminum and metal. Ideal safety locks for home, public and commercial occasions