The Slip-Safe Supreme™ is an intermediate steel breakaway sign support system developed by Nucor Marion Steel Inc. This system meets the crash test acceptance requirements of NCHRUP Test Level 3. The system consists of an upper and lower stub sections, each consisting of opposing U-Channel posts. The upper and lower stubs are inserted into respective upper and lower sleeves comprised of opposing post slip base halves. The post stubs are connected to the sleeve tubes via the applicable hardware. Various heights are available.