So ... at times bring clarity in here. This part can not so funktionieren.Keine idea why it wird.Auf sold definitely not you get it back, a round piece disc of selfsame, herauszuschneiden.Ich myself am 10 years Window fitter been and know what I am in rede.Die voltage glass is much too high ... as the one in the center which separate out kann.Mann has also no so-called Freischnitt.Das glass is only scratched with a glass cutter and then gebrochen.Vorzugsweise straight pieces. So .... waste of money.