Neu-Isenburg, Germany
Founded in 1952., JOST is a leading global producer and supplier of safety-critical systems to the truck and trailer industry. Since 2001. ROCKINGER brand is a part of the JOST group. ROCKINGER has played a decisive role in shaping the technical development of trailer couplings, and the brand name has come to stand for the highest product quality in this field. With its global distribution network and production facilities in thirteen countries across five continents, JOST has direct access to all major truck and trailer manufacturers and relevant end customers. ISO 9001:2008, SO TS 16949:2009 and OHSAS 18001:2007 certificates guarantee the quality of JOST products.

Krefeld, Germany
Ringfeder is a German company based in Krefeld. The company manufactures automatic bolt coupling devices. While they are not the sole manufacturer of these devices, their name has become the universal term (a generic trademark). Ringfeder is a part of the large Swedish company, VBG Group.

Sheffield, United Kingdom
UC is a worldwide distributor of commercial vehicle and trailer components with over 100 years’ experience in the industry. UC offers over 30,000 products across 14 major groups backed by our stringent quality control process and new product developments regulated by ISO9001/2008 accreditation.

Samsun, Turkey
Sampa Automotive is one of the fastest growing suppliers of parts for heavy duty vehicles, trailers and buses, founded in 1994. With great variety of products (more than 30.000) mostly manufactured in their own 80000 m2 product facility in Samsun, Turkey, Sampa currently operates in 116 countries around the world, selling over 20000 tons of products annually. SAMPA has the biggest R&D Centre in the region (3000 m2 and 74 R&D engineers), and is determined to move ahead of OEM quality. Their goal is becoming a global leader in aftermarket segment until 2025.