A significant part of DIA business is the supply of custom made extrusions. These are for the manufacture of many various industries including glass and glazing, shopfitters, Point of sale, exhibition and many more who in turn supply such names as Bhs, M&S, Primark, New Look, Next, Monsoon, Accessorize, Dorothy Perkins, Warehouse, TK Max, Ernest Jones, John Lewis, Debenhams, Halfords, Nike,, Somerfields, the Co-op, McDonalds Restaurants, Dixon Store Group and most other high street chains.

From inception it has been DIA's motto:
'We are here to help you achieve what you want'.
This is our objective and we would like to be known for it. No project is too big or too small. We are always happy to assist customers with the design of new profiles to meet their special requirements, and to give them the benefit of our knowledge and experiences.'