Ideal rolling doors are perforated with holes or slits into them to achieve that delicate balance of security-with-aesthetic-ish visibility. Such rolling shutters can be installed into retail shops, showrooms, and commercial units, being drilled with very tiny holes that allow air and visibility yet retain their strength to prevent unauthorized entry. Made from thick stainless steel o... https://shuttersstop.co.uk/rollershutters/perforated-roller-shutters/