The CBN tips are made by GE company of America,the quality is super. PCBN inserts are suitable for the high-speed and super high-speed precision machining of hardened steel of HRC>45, wear-resistant cast iron, heat-resistant alloys of HRC>35, pearlite grey cast iron, nodular cast iron, Fe-based P/M sintered materials and hardened cast iron.Inner packing:Plastic boxesOuter packing:Cartons