Incorporates both a latchbolt and a separate hacksaw resistant deadbolt. Suitable for use on inward opening doors, it has a 60mm backset. The deadbolt can be locked into two positions by the internal or external cylinder using the key. With the added security of a 6 pin anti-torque cylinder to help prevent wrench attack, the sturdy overall construction of the lock is designed to offer good resistance to force, whilst the double deadlocking bolt ensures that entry cannot be gained by anyone breaking the glass and releasing the latch handle.