.Jointing the pipe with fittings, expanding pipes, cutting pipes and crimping pipes Fitting tool used for system of REHAU HIS 311 hot and cold water plumbing,underfloor heat&cool water Time saving when using double tightening fixture under the condition of not changing accessories, there are two kinds of size of tightening fixture available Used for the installation of the ordinary place, also for the narrow corner Developed item with high quality of aluminum, manufacturing by CNC machine, more precise, simple operation