Approvals by customers
| Preferred Supplier of the Bosch Group in the material group Steel | [GB] |
| LISEGA SE - Witten, Siegen, Hagen, Krefeld | [D/GB] |
| Deutsche Bahn AG - Witten | [GB] |
| Supplier Approval of the Schaeffler group (FAG, INA und LUK) (For the DEW plant Witten) | [GB] |
| Supplier Approval of the Schaeffler group (FAG, INA und LUK) (For the DEW plant Siegen) | [GB] |
| Formel Q Volkswagen Aktiengesellschaft (DEW plant Siegen) | [D] |