The USAG brand was established in 1926, when entrepreneur Hermann Amos built the first manufacturing plant in Gemonio, Italy under the name Utensileria Società Anonima Gemonio.
USAG began to manufacture and operate in the professional tools sector alongside other companies in Italy. In 1991 USAG became part of the French Group Facom Tools S.A., then of the American Group The Stanley Works and, by March 2010, of the Multi-National Group Stanley Black & Decker Inc. Since than USAG is the main constituents of Global Professional High Quality Hand Tools Group of Stanley Black & Decker.