About RST-Steel Established in 2005 in Nivala, Finland, RST-Steel is a premier Nordic manufacturer of heavy-duty stainless steel vehicle equipment. Engineered specifically to withstand the harsh freezing conditions of Northern Europe, RST-Steel builds high-grade bull bars, roof bars, low bars, and light bars designed for ultimate durability, style, and road safety, for trucks, vans, tractors and work machinery.