Before installation I was surprised by the reference in the enclosed instructions that in poor mounting options (softwood or plastic windows) Quote: "multiple backups and additional mounting hardware (Abus fastening anchor BA, Abus IM100 or composite mortar)" should be used. This I could with my plastic windows from to the 80's thankfully not notice. Unfortunately, however, (ie before buying) it is not mentioned as part of the product description. But what troubles me, is a report from the Stiftung Warentest (issue 3 of 2005): Very weak hinge side protection for inward opening turn and turn / tilt windows. The product turns to when the window opens. ... This test result with very weak assurance I can not understand personally. Surely the principle as in the instructions apply addressed that the attachment is better, the longer the screws. But that the product is to be soooo bad, I do not think so. Perhaps there is in the meantime since the report of 2005, the product has been improved. I feel in any case after assembling this window locks much safer in my apartment and this window hinge backups complicate certainly a burglary attempt and most burglars might break from the trial if it takes too long, for example, with the forced opening (if necessary discovery risk) or too heavy is. 100% security does not exist anyway! Conclusion: In general, I would recommend this hinge securing much! You do not cost the earth. And at a deck / balcony door two hinge backups are useful!
