Cheap And Discounts D14.1 to D16mm HRC55 5XD Carbide Twist Drill Bit With Cooling Hole Tungsten 2 Flutes CNC Machine for Metal Working Cutting Tools Wholesale. Buy Directly From Merchant XiangSu Tools Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.