1)top quality of China 2)life time guarantee 3)very good price, 4) replace 2" threading machine Top quality dies stock and pipe threader!aluminum alloy dies stock, aluminum dies head cover, make the tool lighter than ordinary products.CNC lathe produced dies , keep the dies' error in minimum.1/2"-3" and 1/2"-4" dies head and ratched handle available. handle dies stock(pipe threader)