The AV4D hook
We have retained tried-and-tested features and have also added improved ones: The new generation of automatic multi-point locking systems features a solid hook (2) in a new geometry that extends automatically without turning the key and, locked against being pushed back, retracts deep behind the keep rail. This means the door is securely locked when pulled closed which makes a break-in more difficult. Combined with an additional sealing element (1), the door sash is kept more securely in position and protects against the effects of weather and heat losses. The new geometry of the hook effectively counteracts the warping of the door.