Material : The SER/L1616H16 5/8” metal lathe cutting tool holder material is 40Cr steel, it has the characteristics of durability, sturdiness and stability, and good anti-rust performance. The 11ER A60 threading turning inserts material is carbide, and the coating is Nanostructured TIAIN, It has good toughness, wear resistance and high temperature resistance, the carbide insert can uesd for processing steel.