Leiston thrived in the late 19th and early 20th centuries as a manufacturing town, dominated by Richard Garrett & Sons, owners of Leiston Works, which boasted the world's first flow assembly line, for the manufacture of portable steam engines. The firm also made steam tractors and a huge variety of cast and machined metal products, including munitions during both world wars. The works closed in 1981 and the site was reused as a mixture of housing, flats and industrial sites. The Long Shop Museum, showing the history, vehicles and products of the works, remains as a heritage tourist attraction.