MABUARN 8-piece carbide insert is a mixed model indexable inserts set. It contains 1 piece of 11IR AG60 internal threading insert, 3 pieces of DCMT070204 turning inserts, and 4 pieces of CCMT060204 turning inserts. It's applicable for our 5/16" shank turning tool holder 8-piece set or other turning tool holders, and suitable for machining steel, cast iron, stainless steel, metal, etc. There are three different kinds of style for options: for steel machining, stainless steel machining, aluminum machining.