KEEP CHILDREN SAFE: The safety lock can help keep sliding windows locked, prevent children from falling, and stop others invading. This window stopper is gonna protect them from getting injured. SUIT FOR MOST DOOR AND WINDOW: The safety stopper is equipped with a rotatable switch, easy to change the distance of the card slot (0.98inch/2.5cm-1.57inch/4cm), easy to use, suitable for most window and door. WILL NOT SCRATCH WINDOW: This baby door stopper can be use for both window and door. The window lock is non-slip, and with a flexible protective cover will not scratch the window card slot. You can use the safety door stopper with confidence. PACKAGE INCLUDED: This grey child door stopper is made of high quality Iron, strong and durable, can use for a long time.You will received 2* safety locks. Size: 6*3.5*3cm