0004 ISO H6 The addition of our ALTiN coating allows for increased speeds & feeds as well as longer tool lifePremium Sub-Micrograin Solid Carbide End Mill4 FluteSquare EndDouble End 30° HelixRegular LengthCenter Cutting Carbide EndmillALTiN Coated for Increased Performance & Tool LifeALTIN Coating: A high performance coating for milling stainlesssteels, carbon steels, alloy steels, and cast iron.000, -.