The installation was not difficult. A 3.5 mm metal drill I had to but buy only. If one takes the time to the instruction reads, exactly anzeichnet and carefully drilled, which is absolutely creating. My windows have obviously sturdy frame. My cordless screwdriver Makita wanted a completely full battery and the full torque to drill into the frame and screw the screws in. I am convinced that I now have a real obstacle that the burglary attempt takes too much time. What you need to know, however, there is such a lock per 100 cm window height recommended. I also have the impression that this is absolutely necessary. Total full purchase recommendation. I'll furnish my house with it.
