Cheap And Discounts 1 set boring tool BT30 MT2 MT3 MT4 C20 C25 NT30 R8 F1 boring head shank boring cutter + F1 12 boring head diameter 50mm2 inches Wholesale. Buy Directly From Merchant Yif NC tools parts Store Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.