Special Detachable Design---Compared with window openers on the market, the window opener has no key, so there is no risk that the key will be lost and cannot 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 baby falling --- Help to fix the window and meet the ventilation demand. The maximum opening window distance is 7cm, it is much smaller than the distance babies will fall from the window. The window lock can withstand 27 kg of pushing, and 30 kg of tension, no risk of baby opening the window and falling. And there is no risk of closing the window in strong winds. the window or scare BabiesAging Resistance - Install the window restrictor with 3M VHB adhesive, no drilling or tools required. 3M VHB adhesive with strong viscosity (the effect will be better after 72 hours). and can be removed easily without any residue, safe for the window. Strong temperature resistance from -30 to 90, don't worry about hot summer and cold winter.Waterproof and wide range of applications: PC and ABS material makes it stronger and provides longer life. Waterproof material and tape let you don't worry about rainy days. The window restrictor can be used on casement window and casement window.The window restrictor consists of two parts, namely the lock and the locking plate.Strong and durableCompare to the window restrictors in the market, the window restrictors are stronger and have no key, so there is no worry about the key getting lost.Special detachable designA special detachable design makes it easy to change the window opening position.If we want to fully open the window, we can just unlock the latch in two steps.Size: 2.76inch (7cm)Helps repair window and meet ventilation demand.Maximum opening window distance can be 2.76inch(7cm),Babies don't will not fall out of windows with this opening distance.Prevent your child from falling out of the windowThe window lock can withstand 300N (30KGS), no worry baby will open the window and fall.There is no worry of the window being suddenly closed by strong wind which will not damage the window or scare the babies.Package Included: window restrictor*1