The window handles are fixed to the window frame by the standardized 7 mm square pin. How deep the square pin must be pushed into the window to lock it depends on the thickness of the window. The required pin length can be easily measured in advance using a thin object, such as a knitting needle. To do this, push the knitting needle into the opening as far as it will go and mark the spot with your fingernail. If you now measure this distance with a tape measure, you will have the pin length.
In addition, window handles from Griffwerk are equipped with a plain bearing, for a durable, smooth and, above all, noiseless function. Without costly maintenance work!