Features: Hardness up to HRC52, fit for both milling hard material and soft material. Fit for milling stainless steel, cast iron, die steel, 45 steel, A3, steel, Q235, Titanium alloy.(HRC52) Processing life is twice as normal, reduce changing time and increase work efficiency. Suitable for roughing and semi-finishing. Included four carbide inserts APMT1604, APMT1135, RPMW1003, RDMT1204 which can be chosen, meet your various needs.