February 2016. BURG-WÄCHTER now simplifies housebreaking security even more: The new window security line WinSafe, WS 11, 22, 33 and 44, are pre-assembled, extremely easy to build in and to handle. All models – with single or double bolt, for handle, bottom, top or hinge side – are VdS-approved and ECB•S certified. Simultaneous locking mechanisms assure an overall easy handling.