The Trellidor Retractable Security range of fully framed, galvanised steel sliding barriers is custom-made for doors, patios, passages, windows, stairways and retail outlet counters. Models differ in terms of strengthening features. The robust double trellis design helps protect homes and commercial buildings from a break-in. These gates are neat, compact and operate smoothly. All models are fitted with a patented Trellidor locking system that locks in multiple places using just one key in a single lock.