YZ6020: Good toughness, used for processing steel parts below 40 degrees. YZ5115: Upgraded version, Good toughness, Used for processing cast iron.
YZ15TF: Used to process stainless steel and reduce tool breakage. The product has good toughness and high hardness. The cutter bar is made of tungsten steel. It has the advantages of strong wear resistance, heat resistance and corrosion resistance. No insert : there is only one tool bar and wrench in the package. No Cutter bar : There are only 10 blades in the kit. If you choose both blade and holder, you will receive 10pc blades, 1pc holder and wrench.