Ringfeder name (pronounced in English /ˈrɪŋfiːdər/ RING-fee-dər) is a German brand based in Krefeld founded in 1922. The brand manufactures bolt couplings, hook couplings, drawbar eyes, underrun protections and accessories. Ringfeder is part of VBG Truck Equipment, one of the divisions in the VBG Group, a large international industrial group.