That which was considered to be im-
possible for many years in the industry
has now been achieved by AST engi-
neers with flying colours: the world’s first
drive system for sliding bi-fold shutters.
This innovation is characterised by prac-

ticality, ease of operation and reli-
ability. The cost of development has
been worth every cent, and equips
AST windows with another patented
feature that the competition can only
dream of.