As stan­dard, exte­rior doors from Wik­tor­czyk are equipped with a strip lock with 3-​point lock­ing bolts. Two of the bolts come with a steel insert, which pro­tects against saw­ing attempts.

The bolts are not only an anti-​burglary ele­ment, but also an impor­tant struc­tural com­po­nent. When a key is turned in the lower lock insert, they slide out and are inserted into the strike plate strip in the door frame. The fact that the door leaf is tight­ened against the frame reduces warp­ing of leaves.