The VELUX Security Lock (ZOZ 012K1) is needed if you want to enhance the safety of your roof window and home beyond the general safety level. You can easily fit this safety lock made of steel in your window frame yourself. When the safety device is locked, it is not possible to open the sash, but the ventilation function of the window will still work. Please note, this accessory is not compatible with VELUX Top Hung Roof Windows.
Installation guide for VELUX Security Lock ZOZ 012K1