The ARC-TWIN notches both sides of pipe and tubing ends for T-joints with one stroke of the press. There is no deformation, all edges are clean and the “twin notches” form perfect T-joints for welding or brazing. Notching time pet tube or pipe end is less than three seconds. The ARC-TWIN Tandem operates exactly like the ARC-TWIN but uses an extra set of Die inserts to cut notching time in half and double the output. In other words, it double notches two tube or pipe ends at one time. Both die inserts can be the same or different sizes.