The Hydraulic Preset Tool is used to flare the tube ends of tube assemblies with BA style flare geometry. The advantage of using this preset tool is the tube ends can be flared on the work bench versus during final assembly of the tubes to the fittings. Confined spaces at final assembly, the need for large diameter or heavy wall tubes and sheer volume of tube assemblies being installed are primary considerations for selecting to flare tube ends prior to installation and selecting the Hydraulic Preset Tool over the Vise Held Preset Tool.