Lisle 62450 Heater Hose Coupler Kit contains a Heater Hose Coupler Remover that can be driven into couplers and then turned out with a 5/8" socket or wrench When the coupler is extremely corroded the special tapered, reverse drill can be used to remove the remaining connector Then the tap can be used to restore the original threads For use on GM quick disconnect heater hose fittings found on many GM models using the 3.1L, 5.0L, 5.7L and 6.5L engines Includes storage case with tray