Cheap And Discounts YZH 2.1mm~17.5mm Carbide Machine Reamer HRC50 HRC60 Straight Groove 4/6F Tolerance H7 Harened Steel Metal Cutter CNC Inner Hole Wholesale. Buy Directly From Merchant YZH Tools Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.