Cheap And Discounts 4-Flute 65HRC Steel Cast Iron General Machining Tungsten Carbide Solid Flat Square End Mill Milling Cutters with Blue Coating Wholesale. Buy Directly From Merchant Zhuzhou Up Tungsten Carbide Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.