Bolton Gate's Superior folding shutters offer all the advantages of a compact folding door but with the addition of an extremely robust design perfected over sixty years. The door is ideally suited to goods lifts where there is a heavy-duty requirement or where the client is seeking greater longevity. Many of the leading companies such as supermarket chains, factories, warehouses etc. specify the door as they recognise the value for money the Superior door offers particularly when ongoing maintenance is considered.