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The new Trellidor Lockdown Shutter is unique and a first for South Africa. It does not rely on a locked motor, shot bolts or locks with keys to keep it in place once shut. Instead, it has a non-mechanical system of custom-designed slats and guide channels that work together to keep it locked down. This system creates a roller shutter that locks so securely in place that the shutter is virtually impossible to lift once rolled down into position.