Steel Security Doorset


Grey Line

The LIDDLE Series 3 & 4 Steel Security Doorsets have been specifically developed for specialist usage on sites requiring the highest level of security. Designed with prolonged attack time in mind, they provide increased protection to prevent un-authorised entry to highly sensitive access points.


Following extensive research, development and rigorous testing, in which the doorsets resisted a series of professional attacks, the LIDDLE Series 3 & 4 doorsets successfully achieved full product certification.


Careful consideration has been given to the construction of the doorsets, which has been custom designed to suit individual requirements. Our aim was not only to provide security rated doors but more importantly, to be able to offer doorsets which give single point external key access using the various types of cylinders, thus retaining their individual mastering key systems. On both doorsets we can offer several essential features to suit the individual requirements of the client, including Access Control Locking and One Handed Means of Egress.

Product Photographs

  • Doorset 1
  • Doorset 2
  • Doorset 3
  • Doorset 4
  • Doorset 5
  • Doorset 6