The core activity of YERLY Mecanique SA is the development, manufacture and distribution of precision tools and systems for industrial production, particularly in the fields of micromechanics, watchmaking, medical technology and aerospace. The products include, among others, clamping systems, fixtures, mandrels, étages, pliers, plaqueurs and other tools for processing precision parts. The company also offers services such as subcontracting, study and development, and service.