Prevents little hands from opening the oven and getting hurt or burned; keep toddlers safe from kitchen accidents. Helps fix the window and meet the demand for ventilation. The window lock can withstand 27 kg of pushing and 30 kg of tension, no risk of baby opening the window and falling. Suitable for French door refrigerators / side by side refrigerators / 4 door refrigerators and other two door refrigerators. The zer lock can withstand a pulling force of 120 N (12 kg). Prevent children from opening the refrigerator to eat what their parents do not want them to eat or hide in the refrigerator.^ Prevent children from entering specific rooms such as toilets or closets without adult supervision; prevent children from playing with the door and pinching their fingers.