Special Detachable Design---Unlike window restrictors on the market, the EUDEMON window restrictor has no key, eliminating the risk of losing the key and being unable to open the window. The special detachable design makes it easy to change the window opening position to fix the window at a small distance. No Child Falls --- Helps fix the window while meeting ventilation needs. The maximum window opening distance is 7 cm, much less than the distance a child could fall from. The window lock can withstand 27 kg of pressure and 30 kg of pulling force, eliminating the risk of a child opening the window and falling. And there's no worry about slamming the window shut in strong winds or scaring children. Long Lifespan: Install the window restrictor with 3M VHB tape; no drilling or tools are required. 3M VHB tape provides strong viscosity (effect improves after 72 hours) and can be easily removed without any residue, making it safe for the window. Strong temperature resistance from -30℃ to 90℃, so you don't have to worry about hot summers and cold winters. Waterproof and Wide Application --- PC and ABS materials make it stronger and provide a longer lifespan. Waterproof material and tape mean you don't have to worry about rainy days. The window restrictor can be used on casement and awning windows. Excellent Customer Service: Your satisfaction is always our top priority. If you are not 100% satisfied at any point, please do not hesitate to contact us. We hope Eudemon can help you make your home a safer place for your children.