Ougar8 4mm4mm50mm CNC Tungsten Carbide Cutter 4 Flutes Square Flat Shank End mill Endmills Cutter Spiral Milling TiAlN Coated Micrograin solid carbide HRC45 Router bits 1.Material: Tungsten carbide. Main for deep Slotting Milling.Max Cutting material hardness:HRC45 2.Coating witn TiAlN Can Cutting Harden materiel, 3 times Durable than Carbide. 3.4 Flutes; Cutter diameter:4mm(0.157"); Shank diameter:4mm(0.16"); Overall length:50mm(1.97"). 4.For CNC,Engraving machine.Carbon steel,mould steel,alloy steel,inconel,stainless steel,titanium alloy etc 5.Package: 1x End Mill Cutter CNC Bit