The Deluxe Strut Service Tool is easier to use than the standard Strut Service Tool. Typically, the aircraft is placed on jacks. The SUPPLY TANK of the SST2 is partially filled with fluid. As the SST2 is attached to the strut, the pressure in the strut and any foam is released into the RETURN TANK.. The strut is compressed and extended several times until the discharge is all fluid. With the strut compressed, remove the SST2 and service with high pressure air or nitrogen. 14 lbs (6.5Kg) shipping weight.