Manual tool used to widen the end of the copper tube, they are recommended mainly for the manufacture and repair of equipment with tubes, they are made of heat alloy steel for greater durability. This tool achieves a widening in the copper tube to be connected to another tube of a certain size. For its use it is necessary to use a hammer and consider that when tapping the block is seated on a flat surface. It can be used in rigid pipes considering that the ends of the pipes to be flared must be annealed in order to de-temper them and not allow them to crack when the operation is carried out. The flaring acts by means of the blow until the mouth of the pipe is widened by the diameter of the pipe. The expander will penetrate the pipe to proceed with the welding. The use of this manual tool is for pipe, it is inserted at the end to enlarge the original O.D. pipe in order to join the two pipes and to be able to weld. Expanders are available in a set of five sizes. They offer the service technician an innovative, easy to carry and good quality tool.