Tap and Die Set Bearing Steel & Titanium Coated (86 Piece Set)

High-quality material: Made of industrial-grade GCr15 bearing steel, which ensures the firmness of the tool, as well as the better cutting performance of the tool, which effectively improves the service life of the product? Manufacturing Process: All cutting teeth are precision CNC machined and precision heat treated to Rockwell 60 HRC Titanium coating for optimum thread performance, with smooth ground surfaces to reduce friction damage to tools.