●☞Material: Carbide ●☞ Fit for: SER / SNL Threading Holders ●☞ Feature: Suitable for threading for steel and stainless iron . Perform good even in very dirty environment. ●☞Coating: Suitable for steel , Stainless steel parts processing. Coating endows inserts strong impact resistance, good versatility with high precision, High finish and High wear resistance. ●☞Advantage: Wear-resistant and heat-resistant, not easy to stick to the holders or workpieces or break up.Vacuum hardening, exquisite craftsmanship, easy cutting.