Both the 40CrMo steel tool holders are 3/8in shank diameter ,black oxide smooth finish on each turning tool holder marked with tool holder style and shank size. Typically used for turnin;g, boring, facing, etc.
The material of the insert is carbide,the inserts can be used for finishing or semi-finishing steel, the inserts has high hardness, low friction coefficient, good wear resistance and chemical stabi;lity.
Each tool holder comes with a C6 TiN Coated indexable carbide insert with positive rake cutting angle and built-in chip breaker great for general purpose cutting action;
High hardness, low friction coefficient, good wear resistance and chemical stability!