We ordered the lockable window handles, after we caught our 4 year old daughter with us, as with her friend to the navel from the attic windows hung together ... On the same day I ordered the handles and Themselves (female, blonde , academic career) installed. It took a while until I have seen through the principle (especially for me was not immediately evident that the new handles are finished in the factory and you can move the plastic plate only in the unsealed condition), but then it went per window within less than 5 minutes. The now prevailing peace of mind is priceless!
