Tools Extra Long Carbide Square End Mill for Cutting Alloy Steels, Cast Iron, Hardened Steel - 4 Flute Milling Cutter 5/16 Shank (5/16-4" 2PCS)

Coating :All end mill set with MAH Coating,it is excellent resistance to high temperature and thermal impact. Material:HRC62 ultrafine grain tungsten carbide, toughness and hardness and wear resistance. | Manufacturing:Five-axis high precision grinding machine, keep the carbide router bits Stable and controllable. | Quality Control:Each milling bit will be tested on the detecting instrument and laser a code. | Design: Double cutting edge make the milling bits sharper and efficiency, high feed rating and greatly surface finishing. | Application:Finsh Machining and Rough Machining. Inch Size and Diameter Tolerance:Diameter5/16- Cutting Edge Length 2" - Overall Length4.0" Diameter Tolerance:+0.00mm to -0.02mm.