Karl Buch, Roll Foundry, established in 1855 manufactures and produces Chilled Cast Iron and Chromium Cast Steel rolls for the paper, plastics, rubber and food industries, as well as Cast Iron and High Chromium Cast Steel rolls for the steel industry. Recognized for standards of high quality and reliability for over 100 years. Corporate offices and plants are located in Siegen Germany.

Eisenbau Krämer, established in 1921 manufactures rolled & welded steel shells/pipes used in paper machines, other machinery, as well as oil and gas pipelines. In 1990 it was the first German company to obtain ISO 9001 certification for longitudinally welded pipes. Corporate offices and plants are located in Hilchenbach and Recklinghausen Germany.