Architectural Models in Force are offered by a number of manufacturers, who cater to architects, engineering consultants, property developers, marketing agencies, government departments and industries. The models play a key role in communicating ideas to clients, committees, and the general public. They represent a structure, which is built to evaluate the aspects of architectural design. The models are used for show, fundraising, presentation, obtaining permits, and sale purposes. Architectural models for rough study are made using cardboard, wooden blocks, polystyrene, foam, foam boards and other materials. For a detailed architectural model, architects often hire a professional model maker or model making company.