The LC Power Tools UDOS Aero Backing Plate is the OEM replacement for the UDO 51E polisher. When you combine 5 tools in 1, you need a backing plate that is built to handle each of those jobs! All the dynamic features of the LC Power Tools UDOS Aero Backing Plate backing plate work in sync to provide you with the best user experience possible behind your LC Power Tools power tool. The custom molded urethane interface provides precise control of the 51E in all five functions. NACA ducts maximize airflow from the UDOS 51E and UDOS pads keeping heat to a minimum while increasing polishing results. In turn, the increased airflow boosts the durability and lifespan for both the LC Power Tools UDOS Aero Backing Plate and UDOS pad line.