Additional security lock for double casement windows made of aluminium, wood or plastic with middle bar.
Whether they are made of aluminium, wood or plastic, your double-hung windows should always be secured against break-ins. This additional security lock does the job reliably. Also for narrow assembly conditions. The solid turning bolt of the additional security lock locks automatically, a key is only needed to open it. The security device is mounted directly on the frame, so there is no need to drill into the window wings.