EXOCARB® WXL® Premium Performance Carbide End Mills with OSG’s Proprietary WXL® Coating List 3742 - EXOCARB® WXL®: 4 Flute, Square End, Long Length Side Milling Hardness Up to 20 HRC 20 to 30 HRC 30 to 38 HRC 38 to 45 HRC 45 to 55 HRC Mild SteelWork MaterialCarbon SteelsCast IronAlloy SteelsTool SteelsHardened SteelsHardened SteelsPre-hardened SteelsPre-hardened SteelsHardened Steels CuttingSpeed 200 SFM 160 SFM 130 SFM 110 SFM 80 SFM Dia. aa arDepth of CutD≤202.5D0.05D20