V4A (hardened steel) clamping rod that is clamped between the frame and the vertical window bar. Prevents the window from being forced open from the outside. The safety catch can be removed with just one handle and the window can be used as usual. No restriction on the use of the blackout blind and the fly screen.
To determine the required length of the safety clamping rod, you need to measure the distance between the movable window and the window frame.
