5mm 2FL w/.50mm Radius Heavy Core Carbide End Mill For Hardened Alloys, 5mm LOC, 6mm Shank, 75mm OAL, ALTiN Coated 5mm LOC,6mm Shank,75mm OAL DM Series: AT coated heavy core with radius. High strength, high hardness solid carbide radius end mills for HSM roughing & finishing of hardened alloys up to 65HRc. Designed for milling complex contours and shapes in hard metals. Proprietary cemented carbide grade, AlTiN coating & edge prep. Maximum tool life and performance in High Speed Machining applications. Extremely close diameter & radius tolerances. Round Tool Laboratories USA Part #24541