Security lock mechanism 309X tubular frame version, The security lock mechanism 309X is mainly used where an insurance-related locking of the door must be guaranteed by a 20 mm bolt projection., Mechanical self-locking, With cross latch, therefore can be switched for DIN L / DIN R doors, Mechanical sequence control of the self-locking between cross latch and control latch, Burglar-resistant thanks to solid bolt with 20 mm projection, Burglar resistance up to class WK2 achievable in suitable door systems, Panic function ¿ approved according to EN 179 ¿ approved according to EN 1125, Suitable for fire doors, Use with interchangeable fitting, Interchangeable function for unlocking with a key from the outside, The locks in the 309X model series have a continuous handle follower and therefore require interchangeable fitting (inside handle or panic handle bar, outside button or handle bar).