Drawshield draws shields based on their "blazon", or heraldic description.
The project consists of three main parts
Drawshield can faithfully reproduce very complex blazons such as "Gules, on a bend or between two escallops argent a Cornish chough proper between as many cinquefoils azure; and on a chief of the second a rose of the first seeded gold and barbed vert between two fleur-de-lis of the field".