Features Magnetic Holder to Avoid Drop off of the Adaptor When Working in Odd PositionsTube and Die set stabalizing arm to keep the die and tube in place during tighteningIncreased die compression area helps keep die in placeHigher PSI hydraulic ratio for quicker action and job completionFabricates Push Connect 1/4, 5/16 and 3/8?; GM Fuel Line Flare, Brake Lines and Transmission 5/16 and 3/8?; Flare/Double Flare 3/16, 1/4, 5/16, 3/8 and 1/2?; Metric Bubble Flare 4.75, 6, 8, and 10mm.Contains the 3/8″ & 1/2″ GM Transmission Cooling Line Die & Adapter set.