Window Grilles and Roller Shutters provided by Quality Security Services Ltd. Choose from our comprehensive and high quality window security products including retractable security gates or concertina grilles, removal window bars, anti-vandal screens and roller shutters. Door Security We supply and fit effective door security products in the form of steel doors, fire doors, communal entrance doors, substation doors and made to measure doors. Garage Doors Our insulated roller garage doors, compact garage doors and insurance approved garage doors offer high security and peace of mind for your home.