Patented design: Compared to conventional products, our patented design converts pulling force into pushing force. Our multifunctional child safety lock can withstand more than 500N (approx. 50kg) of tensile stress. This protects your children or babies from dangerous and hot ovens; it also prevents children from opening doors and windows. Multifunctional oven child safety lock: Compared to conventional oven child safety locks, our child safety lock significantly improves its tensile strength. After testing, our tensile force reached the peak value of the suitcase scale (50kg), while conventional oven child safety locks can only reach a tensile force of 25kg. Multifunctional window child safety lock: Installing the child safety lock window does not require a drill or removing window handles. Set the child safety lock at 90. Remove the child safety lock sticker and simply stick it under the window handle. You no longer have to worry about children being dangerous by opening windows. Multifunction - Child safety door lock: Set the child safety lock to a 90 angle. Remove the child safety door lock sticker and simply stick it under the door handle. Children or pets will no longer escape from the room without your supervision.